How many pieces does the LEGO Floating Sea Otters (21366-1) have?

The LEGO Floating Sea Otters set (21366-1) contains 1234 pieces. It was released in 2026 as part of the LEGO LEGO Ideas and CUUSOO theme.

How can I find missing parts for LEGO set 21366-1?

On BrickMissing you can check which parts from the LEGO Floating Sea Otters (21366-1) you already own. Add your LEGO collection and we'll show exactly which of the 1234 pieces you're missing and which you already have.

Can I build the LEGO Floating Sea Otters 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 1234 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Floating Sea Otters from?

The LEGO Floating Sea Otters (21366-1) belongs to the LEGO LEGO Ideas and CUUSOO theme. You can browse all LEGO Ideas and CUUSOO sets on BrickMissing to find more sets from this theme.

Floating Sea Otters

🏷️ 21366-1•🎨 LEGO Ideas and CUUSOO•📅 2026•🧱 1234 parts•Advanced

Immerse yourself in tranquil charm with the LEGO Ideas Floating Sea Otters (21366-1). This exquisite 2026 set invites you to craft an endearing brick-built model of a mother sea otter gracefully relaxing in water, her adorable pup nestled snugly on her belly. Marvel at the intricate details, including mama otter's poseable head, mouth, flippers, and claws, allowing for dynamic display options. You can even present her with a charming buildable clam accessory, adding a touch of realism to this serene scene. A testament to fan creativity, this set originated from a beloved fan design, making it a truly special piece of home decor for animal lovers and LEGO enthusiasts alike.

Parts Inventory

🧱 1234 parts

Part	Color	Qty
Plate 2 x 2 Corner 2420	Black	4×
Tile 1 x 4 with Groove 2431	Black	6×
Brick 1 x 1 3005	Black	4×
Brick 1 x 8 3008	Black	4×
Plate 2 x 4 3020	Black	2×
Plate 2 x 3 3021	Black	2×
Plate 2 x 2 3022	Black	12×
Plate 1 x 2 3023	Black	3×
Plate 1 x 1 3024	Black	4×
Plate 2 x 8 3034	Black	8×

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Plate 2 x 3	3021	Black	2×
Plate 2 x 2	3022	Black	12×
Plate 1 x 2	3023	Black	3×
Plate 1 x 1	3024	Black	4×
Plate 2 x 8	3034	Black	8×
Plate 4 x 8	3035	Black	6×
ROUND BRICK 1X1	3062	Black	4×
FLAT TILE 1X1	3070	Black	2×
Plate 1 x 8	3460	Black	1×
Plate 1 x 3	3623	Black	4×
Technic Plate 2 x 4 [3 Holes]	3709	Black	1×
Plate 1 x 4	3710	Black	2×
Plate 6 x 6	3958	Black	2×
Tile 1 x 8 with Groove	4162	Black	6×
Plate 1 x 10	4477	Black	12×
Plate Special 4 x 6 with Studs on 3 Edges	6180	Black	4×
Plate Special 1 x 2 with Door Rail	32028	Black	1×
Wedge Plate 3 x 2 Right	43722	Black	10×
Wedge Plate 3 x 2 Left	43723	Black	10×
Plate Round Corner 3 x 3	30357	Black	8×
Wedge Plate 3 x 3 Cut Corner	2450	Black	4×
Plate 4 x 4	3031	Black	2×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Black	3×
Plate Special 1 x 8 with Door Rail	4510	Black	2×
Turntable 4 x 4 Square Base, Locking	61485	Black	1×
Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style]	85080	Black	4×
Brick Special 1 x 2 Palisade [aka Log]	30136	Black	1×
Bracket 1 x 2 - 2 x 2 Inverted	99207	Black	6×
Plate 2 x 14	91988	Black	6×
BRICK 2X8	93888	Black	8×
Plate Special 4 x 4 with 2 x 2 Opening	64799	Black	2×
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]	99563	Black	3×
Plate Special 1 x 1 Rounded with Handle	26047	Black	8×
Slope Curved 2 x 1 with Stud Notch Right	29119	Black	2×
Slope Curved 2 x 1 with Stud Notch Left	29120	Black	2×
Tile 2 x 2 Curved, Macaroni	27925	Black	4×
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)	18674	Black	1×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Black	1×
Tile 45° Cut 2 x 2 (Triangle)	35787	Black	2×
FLAT TILE 2X3 W/ ANGLE	35341	Black	1×
PLATE 1X1 W/HOLDER VERTICAL	52738	Black	6×
PLATE 1X2 W/HOLDER, VERTICAL	49563	Black	2×
Bracket 1 x 1 - 1 x 2 Inverted	73825	Black	4×
PLATE 2X1 W/HOLDER,VERTICAL	42923	Black	2×
Plate 1 x 5	78329	Black	1×
Bracket 3 x 2 x 1 1/3 with Bottom Stud Holder	73562	Black	4×
Plate Special 1 x 4 Rounded with 2 Open Studs	77845	Black	2×
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]	3484	Black	4×
Plate 3 x 3 Corner	77844	Black	6×
Slope 33° 2 x 2 Double	3300	Black	1×
Plate 4 x 4 Corner	2639	Black	2×
Plate Special 2 x 2 with Horizontal T-Bar Underneath	5066	Black	2×
Slope Curved 2 x 2 with Stud Notch Left	5095	Black	1×
3.2 SHAFT W/ 5.9 BALL	67692	Black	4×
Slope Curved 2 x 2 with Stud Notch Right	5093	Black	1×
Slope Curved 3 x 1 x 2/3	7302	Black	4×
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle	18651	Black	1×
Technic Pin with Friction Ridges Lengthwise with No Center Slots	61332	Black	2×
Technic Axle Connector with Axle Hole [Reinforced]	42135	Black	2×
Brick 1 x 6	3009	Tan	6×
Plate 1 x 4	3710	Tan	12×
Brick 1 x 1	3005	Tan	2×
Plate 1 x 2	3023	Tan	7×
Plate 2 x 8	3034	Tan	3×
FLAT TILE 1X2	3069	Tan	2×
Plate 2 x 2 Corner	2420	Tan	4×
Plate 2 x 2	3022	Tan	2×
Plate 2 x 4	3020	Tan	6×
Plate 1 x 3	3623	Tan	4×
Brick 1 x 10	6111	Tan	6×
Technic Brick 1 x 1 with Pin Hole	6541	Tan	2×
BRICK 2X6	44237	Tan	3×
Wedge Plate 3 x 3 Cut Corner	2450	Tan	2×
Plate Special 1 x 2 [Side Handle Closed Ends]	48336	Tan	1×
Plate 2 x 10	3832	Tan	1×
Tile 1 x 4 with Groove	2431	Tan	1×
Slope 30? 1 x 2 x 2/3	85984	Tan	2×
BRICK 2X8	93888	Tan	3×
Slope Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges]	11153	Tan	2×
Slope Curved 2 x 1 No Studs [1/2 Bow]	11477	Tan	2×
Slope Curved 2 x 2 x 2/3	15068	Tan	5×
Tile Round 2 x 2 with Hole	15535	Tan	1×
Tile 2 x 4 with Groove	87079	Tan	1×
Wedge Plate 3 x 2 Right	43722	Tan	1×
Tile Round 1 x 1 Quarter	25269	Tan	2×
Bracket 1 x 2 - 2 x 2 Inverted	99207	Tan	2×
Plate Special 2 x 2 with Only 2 studs	33909	Tan	1×
Plate Special 4 x 4 with 2 x 2 Opening	64799	Tan	1×
Slope Curved 3 x 2 No Studs	24309	Tan	1×
Wedge Plate 2 x 2 Cut Corner	26601	Tan	9×
Wedge Curved 4 x 3 No Studs [Plain]	64225	Tan	1×
BRICK 2X10	92538	Tan	4×
Slope Curved 2 x 1 with Stud Notch Right	29119	Tan	6×
Slope Curved 2 x 1 with Stud Notch Left	29120	Tan	6×
Tile 45° Cut 2 x 2 (Triangle)	35787	Tan	2×
Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale)	71752	Tan	2×
Plate 1x1 with Up Right Holder	44842	Tan	8×
PLATE 2X1 W/HOLDER,VERTICAL	42923	Tan	2×
Slope Curved 3 x 2 with Stud Notch Right	80178	Tan	1×
Slope Curved 3 x 2 with Stud Notch Left	80177	Tan	1×
FRONT 4X3X2/3, W/ BOW	31584	Tan	2×
Tile Round 1 x 2 Half Circle	1748	Tan	3×
Slope Curved 2 x 2 with Stud Notch Right	5093	Tan	1×
Slope Curved 2 x 2 with Stud Notch Left	5095	Tan	1×
Technic Axle Pin with Friction Ridges Lengthwise	43093	Black	2×
Plate 1 x 2	3023	Black	7×
Plate 1 x 1	3024	Black	4×
Tile Round 1 x 1 Quarter	25269	Black	4×
Plate 2 x 2	3022	Black	6×
Plate 2 x 3	3021	Black	6×
Plate Round Corner 3 x 3	30357	Black	6×
Wedge Plate 3 x 2 Left	43723	Black	5×
Wedge Plate 3 x 2 Right	43722	Black	5×
Plate 1 x 6	3666	Black	4×
Tile 45° Cut 2 x 2 (Triangle)	35787	Black	2×
Plate 2 x 4	3020	Black	12×
Plate 1 x 3	3623	Black	8×
Animal Body Part, Horn (Cattle) / Tentacle / Vine / Branch / Tongue - Long	13564	Black	6×
Horn with Shaft	88513	Bright Green	8×
Plate Round 1 x 1 with Solid Stud	6141	Orange	10×
ELEMENT SEPARATOR	31510	Orange	1×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]	65304	Orange	2×
Technic Axle 2 Notched	32062	Red	8×
Plate 2 x 2 Corner	2420	Yellow	2×
Plate 1 x 3	3623	Yellow	2×
PLATE 2X2 ROUND	4032	Yellow	3×
BRICK Ø16 W. CROSS	6143	Yellow	12×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Yellow	17×
FLAT TILE 1X1, ROUND	35381	Yellow	2×
Technic Axle 3	4519	Yellow	2×
Plate 1 x 2	3023	Trans-Bright Green	4×
Plate 1 x 4	3710	Tan	6×
Plate Round 1 x 1 with Solid Stud	6141	Trans-Bright Green	5×
Plate 1 x 8	3460	Dark Bluish Gray	1×
Plate 2 x 6	3795	Dark Bluish Gray	1×
Plate 1 x 2	3023	Dark Bluish Gray	2×
Brick Special 1 x 2 Palisade [aka Log]	30136	Dark Bluish Gray	2×
Plate Special 3 x 2 with Rounded End, Hole	3176	Dark Bluish Gray	4×
Plate Special 1 x 2 with Handle on End [Closed Ends]	60478	Dark Bluish Gray	4×
Plate Round 4 x 4 with Pin Hole	60474	Dark Bluish Gray	1×
Plate Special 1 x 2 5.9mm Centre Side Towball Socket	14704	Dark Bluish Gray	2×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Dark Bluish Gray	14×
Plate Special 2 x 4 with Groove and Two Center Studs (Jumper)	65509	Dark Bluish Gray	2×
PLATE 1X2 W/HOLDER, VERTICAL	49563	Dark Bluish Gray	1×
Plate Special 2 x 2 with Horizontal T-Bar Underneath	5066	Dark Bluish Gray	2×
Plant, Plate 1 x 1 Round with 3 Leaves	32607	Black	3×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Black	1×
Plate 2 x 2	3022	Light Bluish Gray	3×
Plate 1 x 5	78329	Light Bluish Gray	8×
Plate 3 x 3 Corner	77844	Light Bluish Gray	2×
Brick 2 x 4	3001	Light Bluish Gray	1×
Plate 2 x 4	3020	Light Bluish Gray	5×
Plate 6 x 8	3036	Light Bluish Gray	1×
Plate 1 x 8	3460	Light Bluish Gray	2×
Brick Arch 1 x 4	3659	Light Bluish Gray	4×
Technic Brick 1 x 2 [1 Pin Hole]	3700	Light Bluish Gray	4×
Brick Arch 1 x 6 Raised Arch	92950	Light Bluish Gray	2×
Plate 2 x 14	91988	Light Bluish Gray	2×
Plate Special 1 x 2 5.9mm Towball Socket	14418	Light Bluish Gray	2×
Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side	22885	Light Bluish Gray	2×
Wedge Plate 2 x 2 Cut Corner	26601	Light Bluish Gray	4×
BRICK 1X2 WITH CROSS HOLE	31493	Light Bluish Gray	16×
Plate Special 1 x 2 [Open O Top Clip]	44861	Light Bluish Gray	2×
Plate 1 x 1 x 2/3 Half Round with Side Stud	3386	Light Bluish Gray	10×
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised - Updated Version	4304	Light Bluish Gray	2×
Technic Pin Connector Perpendicular 2 x 2 Bent	44809	Light Bluish Gray	2×
BALL W. CROSS AXLE	3985	Light Bluish Gray	2×
Wedge Plate 4 x 2 Right	41769	Black	1×
Wedge Plate 4 x 2 Left	41770	Black	1×
Plate 1 x 2	3023	Black	7×
FLAT TILE 1X2	3069	Reddish Brown	2×
Plate 1 x 3	3623	Black	12×
Plate 2 x 3	3021	Black	11×
Plate 1 x 4	3710	Black	2×
Brick 2 x 4	3001	Black	4×
Plate 4 x 8	3035	Black	2×
Plate 2 x 8	3034	Black	1×
Plate 2 x 6	3795	Black	3×
Plate 2 x 2 Corner	2420	Black	6×
FLAT TILE 1X1	3070	Reddish Brown	2×
Plate 2 x 2	3022	Black	1×
Plate 1 x 8	3460	Black	4×
Plate 6 x 6	3958	Black	1×
Plate 1 x 6	3666	Black	2×
Plate 1 x 1	3024	Black	13×
Plate 4 x 4	3031	Black	1×
Plate Round Corner 3 x 3	30357	Black	6×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Black	7×
Wedge Sloped 45° 2 x 4 Triple	47759	Black	2×
Plate Special 1 x 2 with Door Rail	32028	Black	5×
Slope Curved 4 x 1 Double with No Studs	93273	Black	2×
Slope 30? 1 x 2 x 2/3	85984	Black	13×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	Black	6×
Slope Curved 2 x 1 No Studs [1/2 Bow]	11477	Black	13×
Slope 45? 2 x 1 with 2/3 Cutout [New Version]	15672	Black	2×
BRICK 2X8	93888	Reddish Brown	2×
BRICK 2X10	92538	Reddish Brown	2×
Tile 1 x 3	63864	Black	10×
Bracket 1 x 2 - 2 x 2	21712	Reddish Brown	3×
Slope Curved 2 x 2 x 2/3	15068	Black	22×
Tile Round 1 x 1 Quarter	25269	Black	6×
Plate Special 1 x 1 Rounded with Handle	26047	Black	4×
PLATE 3X4 W/ANGLES	28842	Reddish Brown	2×
Plate Special 3 x 2 with Rounded End, Hole	3176	Black	1×
Plate Special 2 x 2 with Only 2 studs	33909	Black	2×
Wedge Plate 2 x 2 Cut Corner	26601	Black	2×
Plate Special 1 x 2 [Side Handle Closed Ends]	48336	Black	3×
Slope 45° 2 x 1 with 2/3 Inverted Cutout and no stud	28192	Black	3×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Black	4×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Black	3×
Tile 45° Cut 2 x 2 (Triangle)	35787	Black	2×
Slope Curved 2 x 1 with Stud Notch Right	29119	Black	25×
Slope Curved 2 x 1 with Stud Notch Left	29120	Black	2×
Tile Special 2 x 2 Corner with Cut Corner - Facet	27263	Black	2×
Tile 2 x 3	26603	Black	1×
Slope Curved 3 x 1 No Studs	50950	Black	6×
Plate Special 1 x 1 with Vertical Tooth	15070	Black	2×
PLATE 1X1 W. HOLDER	44860	Reddish Brown	2×
PLATE 2X1 W/HOLDER,VERTICAL	42923	Reddish Brown	4×
Brick Special 2 x 4 with 3 Axle Holes	39789	Black	2×
Bracket 1 x 1 - 1 x 1	36841	Black	2×
Brick Special 1 x 1 with Studs on 2 Adjacent Sides	26604	Black	6×
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]	3484	Black	2×
Plate Special 1 x 2 with Clip Vertical on End	78256	Black	2×
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised - Updated Version	4304	Black	1×
Slope Curved 2 x 2 x 2/3 Inverted	32803	Black	1×
Wedge Curved 4 x 3 No Studs [Plain]	64225	Black	2×
Plate 3 x 3	11212	Black	2×
Wedge Plate 2 x 4 27° Left	65429	Black	1×
Wedge Plate 2 x 4 27° Right	65426	Black	1×
Brick Round Corner, Curved 3 x 3 x 1 Quarter Circle	76797	Black	2×
Brick Curved 1 x 2 x 1 2/3 with 1 Cutout	5907	Black	10×
Slope 1 x 6 x 1 with 1 x 2 x 1/3 Cutout	4569	Black	2×
Brick Arch 1 x 5 x 3 1/3 Curved Top	5845	Black	2×
Slope Curved 2 x 2 with Stud Notches	66956	Black	3×
Brick Round Corner, Curved 2 x 2 x 2/3 Quarter Circle	5852	Black	7×
Plate Special 1 x 1 Rounded with Handle	26047	Black	4×
Brick 2 x 4	3001	Dark Tan	1×
Plate 2 x 4	3020	Dark Tan	1×
Plate 1 x 1	3024	Dark Tan	1×
Slope 30? 1 x 2 x 2/3	85984	Dark Tan	2×
Plate 2 x 3	3021	Dark Tan	2×
Plate 1 x 3	3623	Dark Tan	1×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Dark Tan	2×
Bracket 1 x 2 - 1 x 2 Inverted	99780	Dark Tan	1×
Slope Curved 2 x 1 with Stud Notch Right	29119	Dark Tan	1×
Slope Curved 2 x 1 with Stud Notch Left	29120	Dark Tan	1×
Wedge Sloped 4 x 2 Triple Right	43711	Dark Tan	1×
Brick Special 1 x 1 with Headlight	4070	Dark Tan	1×
Wedge Sloped 45° 2 x 2 Corner	13548	Dark Tan	5×
Plate Round Corner 3 x 3	30357	Dark Tan	2×
Plate Special 2 x 2 with Only 2 studs	33909	Dark Tan	1×
PL.ROUND 1X1 W. THROUGHG. HOLE	29387	Trans-Neon Green	16×
FLAT TILE 1X4	35371	Trans-Neon Green	59×
PLATE 1X2	28653	Trans-Neon Green	9×
FLAT TILE 1X2	35386	Trans-Neon Green	27×
FLAT TILE 1X1	35403	Trans-Neon Green	12×
1/4 CIRCLE TILE 1X1	84411	Trans-Neon Green	6×
Plate Special 2 x 2 with Double Inverted Curve, 1 Stud	4190	Yellow	18×
FLAT TILE 1X1, ROUND 'NO. 51'	25619	Medium Lime	1×
Technic Plate 2 x 4 [3 Holes]	3709	White	1×
Plate 4 x 4	3031	White	1×
Animal Body Part, Clam / Scallop Half Shell with 4 Studs	18970	White	2×
Bracket 1 x 2 - 2 x 2	21712	White	6×
PL.ROUND 1X1 W. THROUGHG. HOLE	28626	White	4×
Technic Brick 1 x 1 with Axle Hole	73230	White	2×
Bracket 1 x 1 - 1 x 2	79389	White	2×

Build DNA

Parts inventory insights for Floating Sea Otters

1,234 pieces puts this build +2% against the average LEGO Ideas and CUUSOO set and +97% against the average 2026 release.

LEGOLEGO IDEAS AND CUUSOO

Vs average LEGO Ideas and CUUSOO set

+2%+30 parts

This set1,234

Average set1,204

Average LEGO Ideas and CUUSOO set: 1,204 pieces across 97 other sets.

Vs average 2026 set

+97%+608 parts

This set1,234

Average set626

Average 2026 set: 626 pieces across 427 other sets.

Color profile

16different colors

Dominant color

Black

Black597x

52%

Tan143x

13%

Trans-Neon Green129x

11%

Light Bluish Gray76x

Unique parts

6.8 pieces per unique type

167

Repeat factor

Average pieces per unique type.

Most used part

FLAT TILE 1X4

59x

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🧩167unique parts🎨16different colors📊77.1avg. parts per color🏆59×FLAT TILE 1X4

🎨 All LEGO Ideas and CUUSOO sets 📅 All sets from 2026

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