How many pieces does the LEGO HYDRO DYNAMICS Challenge Kit (45804-1) have?

The LEGO HYDRO DYNAMICS Challenge Kit set (45804-1) contains 2052 pieces. It was released in 2017 as part of the LEGO FIRST LEGO League theme.

How can I find missing parts for LEGO set 45804-1?

On BrickMissing you can check which parts from the LEGO HYDRO DYNAMICS Challenge Kit (45804-1) you already own. Add your LEGO collection and we'll show exactly which of the 2052 pieces you're missing and which you already have.

Can I build the LEGO HYDRO DYNAMICS Challenge Kit with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 2052 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO HYDRO DYNAMICS Challenge Kit from?

The LEGO HYDRO DYNAMICS Challenge Kit (45804-1) belongs to the LEGO FIRST LEGO League theme. You can browse all FIRST LEGO League sets on BrickMissing to find more sets from this theme.

HYDRO DYNAMICS Challenge Kit

🏷️ 45804-1•🎨 FIRST LEGO League•📅 2017•🧱 2052 parts•Advanced

HYDRO DYNAMICS Challenge Kit (45804-1) is a LEGO FIRST LEGO League from 2017. This page uses the available set and theme data until a fuller product description is available.

Parts Inventory

🧱 2052 parts

Part	Color	Qty
Wheel 14mm D. x 9.9mm with Centre Groove, Fake Bolts and 6 Spokes 11208	Light Bluish Gray	4×
Tyre 21 x 9.9 11209	Black	4×
Brick Special 1 x 2 with 2 Studs on 1 Side 11211	Light Bluish Gray	4×
Brick Special 1 x 2 with 2 Studs on 1 Side 11211	White	4×
Plate Round 6 x 6 with Hole 11213	Medium Azure	5×
Plate Round 6 x 6 with Hole 11213	White	1×
Plate Round 6 x 6 with Hole 11213	Light Bluish Gray	1×
Plate Special 1 x 2 with Pin Hole on Top 11458	Red	2×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Medium Azure	1×
Plate Round 4 x 4 with 2 x 2 Round Opening 11833	Trans-Clear	13×

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Plate Round 6 x 6 with Hole	11213	White	1×
Plate Round 6 x 6 with Hole	11213	Light Bluish Gray	1×
Plate Special 1 x 2 with Pin Hole on Top	11458	Red	2×
Slope Curved 2 x 1 No Studs [1/2 Bow]	11477	Medium Azure	1×
Plate Round 4 x 4 with 2 x 2 Round Opening	11833	Trans-Clear	13×
Plate Round 4 x 4 with 2 x 2 Round Opening	11833	Bright Light Orange	11×
Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface	11954	Medium Azure	6×
Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface	11954	Black	4×
Vehicle Base 4 x 10 x 2 1/2 with Mudguards, Wheel Pins and 6 x 2 Centre Recess with 3 Holes, Red Wheel Holders	12622c01	Red	1×
Plate Special 1 x 2 5.9mm Centre Side Towball Socket	14704	Light Bluish Gray	1×
Tile 2 x 2 Corner	14719	Red	1×
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes]	14720	Light Bluish Gray	2×
Tile Round 2 x 2 with Bottom Stud Holder	14769	Medium Azure	15×
Tile Round 2 x 2 with Bottom Stud Holder	14769	Yellow	4×
Tile Round 2 x 2 with Bottom Stud Holder	14769	Reddish Brown	13×
Tile Round 2 x 2 with Bottom Stud Holder	14769	Light Bluish Gray	1×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise	15100	Light Bluish Gray	12×
Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version]	15254	Dark Bluish Gray	3×
Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version]	15254	Light Bluish Gray	2×
Technic Panel 3 x 11 x 1	15458	Dark Bluish Gray	7×
Technic Panel 3 x 11 x 1	15458	Light Bluish Gray	6×
Technic Axle 5 with Stop	15462	Reddish Brown	3×
Brick Special 1 x 4 with Masonry Brick Profile	15533	Medium Nougat	2×
Tile Round 2 x 2 with Hole	15535	Red	4×
Tile Round 2 x 2 with Hole	15535	Light Bluish Gray	18×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Dark Bluish Gray	2×
Brick Round 2 x 2, Pin Holes	17485	Yellow	3×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]	18575	Tan	2×
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle	18651	Black	9×
Technic Pin Connector Round 1L [Beam]	18654	Light Bluish Gray	2×
Plate Special 1 x 2 with Pin Hole Underneath	18677	Light Bluish Gray	10×
Plate Round Corners 2 x 6 Double	18980	Light Bluish Gray	21×
Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side	22885	Light Bluish Gray	1×
Plate Round Half 4 x 8	22888	Dark Bluish Gray	10×
Technic Pin Connector Hub with 1 Axle	22961	Light Bluish Gray	3×
Tile Special 1 x 2 Grille with Bottom Groove	2412b	Dark Bluish Gray	6×
Tile Special 1 x 2 Grille with Bottom Groove	2412b	Pearl Gold	1×
Tile Special 1 x 2 Grille with Bottom Groove	2412b	White	10×
Tile Special 1 x 2 Grille with Bottom Groove	2412b	Light Bluish Gray	28×
Wedge Plate 3 x 6 Cut Corners	2419	Dark Bluish Gray	2×
Tile Round 1 x 1 Half Circle	24246	Light Bluish Gray	12×
Tile 1 x 4 with Groove	2431	Red	1×
Tile 1 x 4 with Groove	2431	White	4×
Brick 1 x 2 x 5 with Hollow Studs	2454b	Dark Bluish Gray	2×
Brick 2 x 6	2456	Dark Bluish Gray	1×
Brick 1 x 16	2465	Light Bluish Gray	4×
Technic Driving Ring Connector Smooth [4 rounded side walls]	26287	Red	4×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	White	1×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Black	4×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Trans-Yellow	1×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Light Bluish Gray	9×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Trans-Light Blue	9×
Technic Axle Towball	2736	Light Bluish Gray	2×
Technic Pin with Friction Ridges Lengthwise and Center Slots	2780	Black	158×
Tile 2 x 2 Curved, Macaroni	27925	Light Bluish Gray	8×
Brick 2 x 4	3001	Medium Nougat	1×
Brick 2 x 4	3001	Black	1×
Brick 2 x 4	3001	Dark Bluish Gray	2×
Brick 2 x 2	3003	Red	3×
Brick 1 x 2	3004	White	28×
Brick 1 x 2	3004	Dark Bluish Gray	4×
Brick 1 x 2	3004	Red	2×
Brick 1 x 2	3004	Medium Azure	13×
Brick 1 x 2	3004	Bright Light Orange	5×
Brick 1 x 1	3005	Medium Azure	11×
Brick 1 x 8	3008	Dark Bluish Gray	6×
Brick 1 x 8	3008	Light Bluish Gray	3×
Brick 1 x 6	3009	Medium Azure	10×
Brick 1 x 4	3010	Dark Bluish Gray	8×
Brick 1 x 4	3010	White	1×
Brick 1 x 4	3010	Yellow	2×
Brick 1 x 4	3010	Red	5×
Brick 1 x 4	3010	Medium Azure	17×
Plate 2 x 4	3020	Light Bluish Gray	4×
Plate 2 x 4	3020	Black	1×
Plate 2 x 4	3020	Medium Azure	2×
Plate 2 x 3	3021	White	7×
Plate 2 x 3	3021	Tan	2×
Plate 2 x 2	3022	White	1×
Plate 2 x 2	3022	Light Bluish Gray	3×
Plate 1 x 2	3023	White	7×
Plate 1 x 2	3023	Light Bluish Gray	7×
Plate 1 x 2	3023	Red	3×
Plate 1 x 2	3023	Black	4×
Brick Special 1 x 2 with Vertical Clip [Open O Clip]	30237b	Red	1×
Plate 1 x 1	3024	Trans-Orange	4×
Plate 6 x 12	3028	Dark Bluish Gray	1×
Plate 4 x 10	3030	Tan	2×
Plate 4 x 10	3030	Dark Bluish Gray	2×
Plate 4 x 10	3030	White	6×
Plate 4 x 6	3032	Red	1×
Plate 4 x 6	3032	White	2×
Plate 6 x 10	3033	Light Bluish Gray	1×
Plate 2 x 8	3034	Light Bluish Gray	10×
Plate 2 x 8	3034	Dark Bluish Gray	4×
Plate 2 x 8	3034	White	10×
Plate 6 x 8	3036	Light Bluish Gray	1×
Brick Round 2 x 2 Dome Top, Hollow Stud	30367c	Yellow	1×
Brick Special 1 x 4 with 4 Studs on One Side	30414	Light Bluish Gray	1×
Brick Special 1 x 2 with 2 Pins, Round Pin Holes	30526	Light Bluish Gray	5×
Brick Special 1 x 2 with 2 Pins, Round Pin Holes	30526	Dark Bluish Gray	2×
Panel 4 x 4 x 6 Quarter Cylinder	30562	White	4×
Plate Round Corner 4 x 4	30565	White	16×
Slope Curved 2 x 2 with Lip, No Studs	30602	Trans-Light Blue	2×
Brick Round 1 x 1 Open Stud	3062b	White	4×
Brick Round 1 x 1 Open Stud	3062b	Light Bluish Gray	3×
Brick 1 x 2 without Bottom Tube	3065	Trans-Clear	4×
Tile 2 x 2 with Groove	3068b	Light Bluish Gray	2×
Tile 1 x 2 with Groove	3069b	White	1×
Tile 1 x 2 with Groove	3069b	Red	2×
Tile 1 x 2 with Groove	3069b	Dark Bluish Gray	4×
Tile 1 x 2 with Black Diagonal Stripes, Large Yellow Corner Triangles Print	3069bpr0155	Yellow	6×
Tile 1 x 1 with Groove	3070b	Light Bluish Gray	2×
Tile 1 x 1 with Groove	3070b	Medium Azure	1×
Plate Special 3 x 2 with Rounded End, Hole	3176	Light Bluish Gray	4×
Technic Brick 1 x 2 [2 Pin Holes]	32000	Dark Bluish Gray	4×
Technic Brick 1 x 2 [2 Pin Holes]	32000	Light Bluish Gray	1×
Technic Brick 1 x 2 [2 Pin Holes]	32000	White	2×
Technic Pin 3/4	32002	Tan	4×
Technic Link 1 x 6 without Stoppers	32005a	Dark Bluish Gray	2×
Technic Axle and Pin Connector Angled #1	32013	Light Bluish Gray	1×
Technic Axle and Pin Connector Angled #1	32013	Black	2×
Technic Axle and Pin Connector Angled #1	32013	Yellow	4×
Technic Axle and Pin Connector Angled #6 - 90°	32014	Black	4×
Technic Axle and Pin Connector Angled #5 - 112.5°	32015	Light Bluish Gray	3×
Technic Axle and Pin Connector Angled #3 - 157.5?	32016	Medium Azure	2×
Technic Axle and Pin Connector Angled #3 - 157.5?	32016	Light Bluish Gray	1×
Technic Axle and Pin Connector Angled #2 - 180°	32034	Light Bluish Gray	8×
Technic Axle Connector with Axle Hole	32039	Light Bluish Gray	6×
Technic Axle Connector with Axle Hole	32039	Yellow	3×
Technic Axle Connector with Axle Hole	32039	Black	4×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Light Bluish Gray	6×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Black	10×
Technic Axle 2 Notched	32062	Red	11×
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin	32064a	Red	2×
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin	32064a	Light Bluish Gray	1×
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin	32064a	Dark Bluish Gray	4×
Technic Knob Wheel	32072	Black	2×
Technic Axle 5	32073	Yellow	6×
Technic Axle 5	32073	Light Bluish Gray	3×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Yellow	9×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Light Bluish Gray	8×
Technic Beam 2 x 4 L-Shape Thick	32140	Light Bluish Gray	1×
Technic Beam 2 x 4 L-Shape Thick	32140	Dark Bluish Gray	16×
Technic Beam 2 x 4 L-Shape Thick	32140	Yellow	7×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Black	4×
Technic Axle and Pin Connector Angled #4 - 135°	32192	Black	2×
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin	32250	Dark Bluish Gray	8×
Technic Gear 12 Tooth Double Bevel	32270	Black	3×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	Light Bluish Gray	1×
Technic Beam 1 x 15 Thick	32278	Dark Bluish Gray	4×
Technic Beam 1 x 15 Thick	32278	Light Bluish Gray	6×
Technic Beam 1 x 5 Thick	32316	White	5×
Technic Beam 1 x 5 Thick	32316	Light Bluish Gray	3×
Technic Beam 1 x 5 Thick	32316	Dark Bluish Gray	10×
Technic Beam 1 x 7 Bent (4 - 4) Thick	32348	Dark Bluish Gray	2×
Brick 1 x 2 x 2 with Inside Stud Holder	3245c	White	5×
Brick 1 x 2 x 2 with Inside Stud Holder	3245c	Dark Bluish Gray	4×
Technic Gear 36 Tooth Double Bevel	32498	Black	1×
Technic Beam 1 x 3 Thick	32523	Yellow	3×
Technic Beam 1 x 3 Thick	32523	Black	4×
Technic Beam 1 x 3 Thick	32523	Dark Bluish Gray	10×
Technic Beam 1 x 3 Thick	32523	White	2×
Technic Beam 1 x 3 Thick	32523	Light Bluish Gray	4×
Technic Beam 1 x 7 Thick	32524	Yellow	2×
Technic Beam 1 x 7 Thick	32524	Black	2×
Technic Beam 1 x 7 Thick	32524	White	4×
Technic Beam 1 x 7 Thick	32524	Light Bluish Gray	4×
Technic Beam 1 x 11 Thick	32525	Light Bluish Gray	1×
Technic Beam 1 x 11 Thick	32525	Black	2×
Technic Beam 1 x 11 Thick	32525	White	14×
Technic Beam 1 x 11 Thick	32525	Dark Bluish Gray	12×
Technic Beam 3 x 5 L-Shape Thick	32526	White	2×
Technic Pin Connector Plate with One Hole (Single on Bottom)	32529	Black	4×
Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top]	32530	Dark Bluish Gray	2×
Technic Pin Long without Friction Ridges	32556	Tan	3×
Technic Pin Connector Perpendicular Long	32557	Light Bluish Gray	4×
Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced	33299b	Light Bluish Gray	4×
Animal, Frog	33320	Pearl Gold	1×
Plate 1 x 8	3460	Dark Bluish Gray	6×
Plate 1 x 8	3460	Light Bluish Gray	7×
Plate 1 x 3	3623	Dark Bluish Gray	20×
Plate 1 x 3	3623	Light Bluish Gray	22×
Technic Gear 40 Tooth	3649	Light Bluish Gray	1×
Brick Arch 1 x 4	3659	Light Bluish Gray	6×
Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]	3660	Light Bluish Gray	1×
Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]	3660	White	1×
Plate 1 x 6	3666	Red	2×
Plate 1 x 6	3666	Dark Bluish Gray	4×
Technic Pin without Friction Ridges Lengthwise	3673	Light Bluish Gray	24×
Slope 65° 2 x 2 x 2 with Bottom Tube	3678b	Dark Bluish Gray	4×
Technic Brick 1 x 2 [1 Pin Hole]	3700	Dark Bluish Gray	8×
Technic Brick 1 x 2 [1 Pin Hole]	3700	Light Bluish Gray	2×
Technic Brick 1 x 4 [3 Pin Holes]	3701	Dark Bluish Gray	4×
Technic Brick 1 x 8 [7 Pin Holes]	3702	Light Bluish Gray	2×
Technic Axle 4	3705	Red	9×
Technic Axle 4	3705	Black	5×
Technic Axle 6	3706	Red	2×
Technic Axle 6	3706	Black	3×
Technic Axle 8	3707	Black	3×
Technic Axle 12	3708	Red	2×
Technic Axle 12	3708	Black	10×
Technic Plate 2 x 4 [3 Holes]	3709	White	7×
Plate 1 x 4	3710	Red	7×
Plate 1 x 4	3710	Light Bluish Gray	2×
Plate 1 x 4	3710	White	15×
Plate 1 x 4	3710	Dark Bluish Gray	10×
Technic Bush	3713	Light Bluish Gray	11×
Technic Plate 2 x 8 [7 Holes]	3738	Light Bluish Gray	2×
Technic Gear Rack 1 x 4	3743	Light Bluish Gray	2×
Slope Inverted 33° 3 x 2 [Connections between Studs]	3747b	Dark Bluish Gray	1×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Tan	10×
Plate 2 x 6	3795	White	2×
Plate 2 x 6	3795	Light Bluish Gray	5×
Plate 2 x 6	3795	Dark Bluish Gray	1×
Plate 2 x 10	3832	Light Bluish Gray	5×
Plate 2 x 10	3832	White	1×
Weapon Axe	3835	Black	1×
Technic Brick 1 x 6 [5 Pin Holes]	3894	Dark Bluish Gray	4×
Technic Brick 1 x 6 [5 Pin Holes]	3894	Yellow	2×
Brick Round 2 x 2 with Axle Hole	3941	Light Bluish Gray	4×
Brick Round 2 x 2 with Axle Hole	3941	Yellow	5×
Brick Round 2 x 2 with Axle Hole	3941	Trans-Clear	13×
Cone 2 x 2 x 2, Open Stud	3942c	Yellow	1×
Dish 4 x 4 Inverted [Radar]	3960	White	1×
Dish 4 x 4 Inverted [Radar]	3960	Trans-Light Blue	2×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Medium Azure	1×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Light Bluish Gray	13×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Black	5×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	White	11×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Yellow	4×
Technic Beam 1 x 9 Thick	40490	Dark Bluish Gray	12×
Technic Beam 1 x 9 Thick	40490	Light Bluish Gray	4×
Technic Beam 1 x 9 Thick	40490	Black	4×
Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]	4081b	White	1×
Plate 8 x 8	41539	Dark Bluish Gray	1×
Tile 1 x 8 with Groove	4162	Light Bluish Gray	5×
Tile 1 x 8 with Groove	4162	Medium Azure	4×
Technic Beam 1 x 2 Thin	41677	Dark Bluish Gray	5×
Technic Axle and Pin Connector Perpendicular Double Split	41678	Dark Bluish Gray	2×
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	42003	Dark Bluish Gray	2×
String Reel 2 x 4 x 2 Drum	4208	Black	1×
String Reel 2 x 4 x 2 Holder With Open Studs	4209b	Red	1×
Technic Pin 1/2	4274	Black	17×
Plate 2 x 16	4282	Dark Bluish Gray	1×
Dish 6 x 6 Inverted, Radar / Webbed [Anti-studs at 90°]	4285b	Trans-Light Blue	1×
Slope 33° 3 x 1	4286	Dark Bluish Gray	3×
Technic Axle Pin with Friction Ridges Lengthwise	43093	Black	15×
Box 2 x 2 x 2 [Hollow Studs]	4345b	Red	1×
Box 2 x 2 x 2 Door with Slot	4346	Light Bluish Gray	1×
Equipment Camera with Side Sight [aka Space Gun]	4360	Black	1×
Technic Beam 1 x 2 Thick	43857	Light Bluish Gray	11×
Technic Axle 7	44294	Yellow	1×
Technic Axle 7	44294	Light Bluish Gray	13×
Bracket 1 x 2 - 2 x 2	44728	Light Bluish Gray	2×
Bracket 1 x 2 - 2 x 2	44728	Red	2×
Bracket 1 x 2 - 2 x 2	44728	White	2×
Bracket 1 x 2 - 2 x 2	44728	Yellow	2×
Plate 1 x 10	4477	White	9×
Plate Special 1 x 8 with Door Rail	4510	Light Bluish Gray	1×
Technic Axle 3	4519	Yellow	5×
Technic Axle 3	4519	Light Bluish Gray	8×
Slope Curved 4 x 4 x 2/3 Triple Curved with 2 Studs	45677	Red	1×
Slope Curved 4 x 4 x 2/3 Triple Curved with 2 Studs and 'HYDRO DYNAMICS COACH' print	45677pr0007	White	4×
Windscreen 2 x 4 x 2 Vertical	4594	Trans-Clear	1×
Bar 1 x 3 [Clip / Anti-Stud]	4735	Black	1×
Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs	48092	Medium Azure	22×
Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs	48092	Medium Nougat	8×
Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs	48092	Light Bluish Gray	24×
Plate Special 1 x 2 [Side Handle Closed Ends]	48336	Light Bluish Gray	9×
Technic Pin Connector Hub Perpendicular 3L with 4 Pins	48989	Light Bluish Gray	2×
Slope Curved 3 x 1 No Studs	50950	Bright Green	2×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Trans-Dark Blue	1×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Trans-Red	1×
Technic Axle 8 with Stop	55013	Dark Bluish Gray	3×
Technic Tread Sprocket Wheel Small 6 Tooth	57520	Black	2×
Technic Axle Connector Hub with 3 Axles at 120°	57585	Light Bluish Gray	2×
Panel 1 x 6 x 5	59349	White	1×
Panel 1 x 6 x 5	59349	Dark Bluish Gray	1×
Technic Axle 5.5 with Stop [Rounded Short End]	59426	Dark Bluish Gray	3×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Black	1×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Light Bluish Gray	4×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Yellow	1×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Reddish Brown	9×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Dark Bluish Gray	12×
Cone 1 x 1 [Top Groove]	59900	Yellow	3×
Brick Arch 1 x 3 x 2 Curved Top	6005	Light Bluish Gray	4×
Plate Round 4 x 4 with Pin Hole	60474	White	1×
Plate Round 4 x 4 with Pin Hole	60474	Light Bluish Gray	4×
Plate Round 4 x 4 with Pin Hole	60474	Bright Light Orange	1×
Plate 1 x 12	60479	Light Bluish Gray	8×
Slope 65° 2 x 1 x 2	60481	Dark Bluish Gray	4×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	Black	2×
Technic Beam 3 x 3 T-Shape Thick	60484	Light Bluish Gray	1×
Technic Axle 9	60485	Light Bluish Gray	6×
Technic Axle 9	60485	Yellow	1×
Door Frame 1 x 4 x 6 Type 2	60596	Black	1×
Door 1 x 4 x 6 with 4 Panes and Stud Handle	60623	White	1×
Brick Curved 2 x 4 x 1 1/3	6081	Light Bluish Gray	1×
Brick Curved 2 x 4 x 1 1/3	6081	Red	1×
Equipment Hose Nozzle / Gun with Side String Hole Simplified	60849	Light Bluish Gray	1×
Brick 1 x 12	6112	Light Bluish Gray	6×
Plate Round 1 x 1 with Solid Stud	6141	Medium Azure	3×
Plate Round 1 x 1 with Solid Stud	6141	Pearl Gold	4×
Plate Round 1 x 1 with Solid Stud	6141	Light Bluish Gray	6×
Plate Round 1 x 1 with Solid Stud	6141	Black	4×
Plate Round 1 x 1 with Solid Stud	6141	White	6×
Plate Round 1 x 1 with Solid Stud	6141	Red	2×
Brick Arch 1 x 6 x 2 Curved Top	6183	Light Bluish Gray	3×
Brick Arch 1 x 6 x 2 Curved Top	6183	White	2×
Technic Universal Joint 3L [Complete Assembly]	61903	Light Bluish Gray	6×
Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole	6222	Light Bluish Gray	2×
Windscreen 3 x 6 x 1 Curved with 2 Circular Stud Holders in Bottom	62360	Trans-Light Blue	2×
Technic Pin Connector Round [Slotted]	62462	Pearl Gold	1×
Technic Pin Connector Round [Slotted]	62462	Bright Green	1×
Technic Pin Connector Round [Slotted]	62462	Yellow	10×
Technic Pin Connector Round [Slotted]	62462	Light Bluish Gray	7×
Technic Panel Curved 11 x 3 with 2 Pin Holes through Panel Surface	62531	Yellow	4×
Cylinder Half 2 x 4 x 4	6259	Trans-Light Blue	10×
Tile 1 x 3	63864	Red	1×
Tile 1 x 3	63864	Yellow	5×
Technic Axle and Pin Connector Perpendicular Triple	63869	Light Bluish Gray	1×
Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick	64178	Light Bluish Gray	2×
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick	64179	Light Bluish Gray	5×
Technic Panel 5 x 11 x 1	64782	Light Bluish Gray	2×
Technic Panel 5 x 11 x 1	64782	Light Bluish Gray	6×
Technic Axle and Pin Connector Perpendicular	6536	Yellow	2×
Technic Axle and Pin Connector Perpendicular	6536	White	2×
Technic Axle and Pin Connector Perpendicular	6536	Light Bluish Gray	3×
Technic Brick 1 x 1 with Pin Hole	6541	Light Bluish Gray	7×
Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle)	6553	Dark Bluish Gray	2×
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots	6558	Black	104×
Technic Gear 12 Tooth Bevel	6589	Tan	2×
Technic Pin with Friction Ridges Lengthwise and Towball	6628	Black	5×
Tile 1 x 6 with Groove	6636	Light Bluish Gray	11×
Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly]	73983	Yellow	2×
Hose, Ribbed 7mm D. 18L / 14.4cm	78c18	Flat Silver	2×
Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style]	85080	Yellow	24×
Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style]	85080	White	48×
Wave / Flame Rounded Large with Marbled Trans-Yellow Pattern	85959pat0003	Trans-Red	2×
Slope 30? 1 x 2 x 2/3	85984	Red	1×
Slope 30? 1 x 2 x 2/3	85984	Light Bluish Gray	18×
Tile 2 x 4 with Groove	87079	Dark Bluish Gray	5×
Tile 2 x 4 with Groove	87079	Red	3×
Tile 2 x 4 with Groove	87079	White	1×
Technic Panel Fairing #1 Small Smooth Short, Side A	87080	Dark Purple	4×
Brick Round 4 x 4 Centre Hole	87081	Red	6×
Brick Round 4 x 4 Centre Hole	87081	Reddish Brown	1×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Light Bluish Gray	1×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	White	3×
Wedge 2 x 2 Facet	87620	Light Bluish Gray	4×
Technic Gear Rack 1 x 7 with Axle and Pin Holes	87761	Black	2×
Technic Link Tread Wide with Two Pin Holes, Reinforced	88323	Medium Nougat	12×
Technic Link Tread Wide with Two Pin Holes, Reinforced	88323	Dark Bluish Gray	2×
Plate 8 x 16	92438	Dark Bluish Gray	2×
Brick Arch 1 x 6 Raised Arch	92950	Light Bluish Gray	2×
Slope Curved 4 x 1 Double with No Studs	93273	Light Bluish Gray	8×
Bracket 1 x 2 - 2 x 4	93274	Light Bluish Gray	6×
Technic Gear 16 Tooth Reinforced [New Style]	94925	Light Bluish Gray	2×
Brick and Axle Separator v2.0	96874	Orange	1×
Tile Round 1 x 1	98138	Trans-Red	2×
Tile Round 1 x 1	98138	Trans-Clear	2×
Brick Special 1 x 2 with Masonry Brick Profile	98283	Dark Bluish Gray	4×
Large Figure Weapon, Barrel with 2 Pin Holes and 3 Axle Holes	98585	Light Bluish Gray	3×
Technic Axle 4 with Centre Stop	99008	Tan	7×
Bracket 1 x 2 - 2 x 2 Inverted	99207	Light Bluish Gray	2×
Bracket 1 x 2 - 2 x 2 Inverted	99207	Black	2×

Build DNA

Parts inventory insights for HYDRO DYNAMICS Challenge Kit

2,052 pieces puts this build +100% against the average FIRST LEGO League set and +439% against the average 2017 release.

LEGOFIRST LEGO LEAGUE

Vs average FIRST LEGO League set

+100%+1,025 parts

This set2,052

Average set1,027

Average FIRST LEGO League set: 1,027 pieces across 48 other sets.

Vs average 2017 set

+439%+1,671 parts

This set2,052

Average set381

Average 2017 set: 381 pieces across 450 other sets.

Color profile

24different colors

Dominant color

Light Bluish Gray

Light Bluish Gray596x

29%

Black418x

20%

Dark Bluish Gray270x

13%

White260x

13%

Unique parts

8.8 pieces per unique type

233

Repeat factor

Average pieces per unique type.

Most used part

Technic Pin with Friction Ridges Lengthwise and Center Slots

158x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩233unique parts🎨24different colors📊85.5avg. parts per color🏆158×Technic Pin with Friction Ridges Lengthwise and Center Slots

🎨 All FIRST LEGO League sets 📅 All sets from 2017

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