# LEGO 9725-3 — ROBOLAB Amusement Park Set (2005)

Source: https://www.brickmissing.com/sets/9725-3-robolab-amusement-park-set
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

## Set facts

- Set number: 9725-3
- Name: ROBOLAB Amusement Park Set
- Theme: Mindstorms
- Released: 2005
- Pieces: 306
- Distinct part + colour lots: 94
- Build difficulty: intermediate
- Repairability: 7.4% of this set's lots are hard to replace (7 of 94 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (94 lots, 306 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 2 | Tyre 30 x 10.5 Offset Tread | Black | 2346 | 234626 | — |
| 2 | Tile 1 x 4 with Groove | Black | 2431 | 243123 | €0,12 |
| 4 | Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] | Black | 2444 | 244423 | — |
| 1 | Costume Ghost Shroud | Glow In Dark Opaque | 2588 | 258850 | — |
| 2 | Plate Round 2 x 2 with Rounded Bottom [Boat Stud] | Black | 2654 | 4278359 | €0,07 |
| 12 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 2 | Technic Wedge Belt Wheel Tire | Black | 2815 | 6028041 | €0,38 |
| 2 | Technic Beam 1 x 4 Thin with Stud Connector | Light Bluish Gray | 2825 | 6331574 | €0,21 |
| 2 | Technic Engine Crankshaft Center | Dark Bluish Gray | 2854 | 2854199 | — |
| 1 | Sensor, Light with Fixed Cable | Black | 2982c01 | 4119421 | — |
| 2 | Motor Pulley, 9V Micromotor with axle hole | Light Bluish Gray | 2983 | 4493377 | — |
| 2 | Brick 2 x 4 | Red | 3001 | 300121 | €0,22 |
| 4 | Brick 1 x 2 | Red | 3004 | 300421 | €0,11 |
| 6 | Plate 1 x 2 | Black | 3023 | 302323 | €0,08 |
| 4 | Slope 45° 2 x 1 with Bottom Pin | Red | 3040b | 4121934 | €0,10 |
| 1 | Tile 2 x 2 with Groove | Yellow | 3068b | 306824 | €0,07 |
| 1 | Tile 2 x 2 with Groove | Black | 3068b | 306823 | €0,07 |
| 1 | Tile 2 x 2 with Groove | Red | 3068b | 306821 | €0,07 |
| 1 | Tile 2 x 2 with Groove | White | 3068b | 306801 | €0,07 |
| 1 | Tile 1 x 2 with Groove | Black | 3069b | 306923 | €0,07 |
| 1 | Tile 1 x 2 with Groove | Red | 3069b | 306921 | €0,07 |
| 1 | Tile 1 x 2 with Groove | White | 3069b | 306901 | €0,07 |
| 1 | Tile 1 x 2 with Groove | Yellow | 3069b | 306924 | €0,07 |
| 8 | Technic Pin 3/4 | Dark Bluish Gray | 32002 | 32002199 | — |
| 2 | Technic Axle and Pin Connector Angled #1 | Black | 32013 | 6332570 | €0,08 |
| 8 | Technic Beam 1 x 5 Thin | Light Bluish Gray | 32017 | 4503416 | €0,15 |
| 4 | Plate Special 1 x 2 with Door Rail | Light Bluish Gray | 32028 | 4211568 | €0,05 |
| 2 | Technic Axle Connector with Axle Hole | Light Bluish Gray | 32039 | 4211553 | — |
| 4 | Technic Axle 2 Notched | Black | 32062 | 4109810 | €0,07 |
| 4 | Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin | Light Bluish Gray | 32064a | 6206248 | €0,17 |
| 2 | Technic Axle 5 | Light Bluish Gray | 32073 | 4211639 | €0,11 |
| 8 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Light Bluish Gray | 32123b | 6271165 | €0,04 |
| 2 | Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole | Black | 32124 | 6280384 | €0,11 |
| 2 | Technic Plate Rotor 3 Blade with Smooth Ends and 6 Studs (Propeller) | Black | 32125 | 4112875 | — |
| 2 | Plate 1 x 8 | Black | 3460 | 346023 | €0,18 |
| 10 | Wheel with Split Axle hole | Yellow | 3482 | 348224 | — |
| 2 | Tyre Offset Tread 24 x 8 | Black | 3483 | 348326 | — |
| 2 | Tyre 43 x 17 | Black | 3634 | 363426 | — |
| 3 | Technic Gear 8 Tooth | Light Bluish Gray | 3647 | 3647194 | — |
| 2 | Technic Gear 24 Tooth [New Style with Single Axle Hole] | Light Bluish Gray | 3648b | 4211565 | — |
| 1 | Technic Gear 40 Tooth | Light Bluish Gray | 3649 | 6195314 | €0,82 |
| 2 | Technic Gear 24 Tooth Crown with Reinforcements [New Style] | Light Bluish Gray | 3650c | 4211434 | — |
| 12 | Technic Pin without Friction Ridges Lengthwise | Light Bluish Gray | 3673 | 4211807 | €0,05 |
| 4 | Technic Brick 1 x 2 [1 Pin Hole] | Red | 3700 | 370021 | €0,12 |
| 4 | Technic Brick 1 x 4 [3 Pin Holes] | Red | 3701 | 370121 | €0,17 |
| 4 | Technic Brick 1 x 8 [7 Pin Holes] | Red | 3702 | 370221 | €0,36 |
| 2 | Technic Brick 1 x 16 [15 Pin Holes] | Red | 3703 | 370321 | €0,82 |
| 2 | Technic Axle 4 | Black | 3705 | 370526 | €0,08 |
| 2 | Technic Axle 6 | Black | 3706 | 370626 | €0,12 |
| 2 | Technic Axle 8 | Black | 3707 | 370726 | €0,22 |
| 2 | Technic Axle 12 | Black | 3708 | 370826 | €0,27 |
| 4 | Technic Plate 2 x 4 [3 Holes] | Black | 3709 | 370923 | €0,13 |
| 2 | Plate 1 x 4 | Black | 3710 | 371023 | €0,12 |
| 20 | Technic Bush | Light Bluish Gray | 3713 | 6275844 | €0,05 |
| 3 | Technic Axle 10 | Black | 3737 | 373726 | €0,25 |
| 4 | Technic Plate 2 x 8 [7 Holes] | Black | 3738 | 373823 | — |
| 4 | Technic Gear Rack 1 x 4 | Light Bluish Gray | 3743 | 6457283 | €0,19 |
| 8 | Technic Axle Pin without Friction Ridges Lengthwise | Tan | 3749 | 4666579 | €0,06 |
| 4 | Plate Special 1 x 2 with 1 Stud without Groove (Jumper) | Brown | 3794a | 379425 | — |
| 2 | Plate 2 x 6 | Black | 3795 | 379523 | €0,19 |
| 1 | Baseplate 16 x 32 | Light Bluish Gray | 3857 | 274828 | — |
| 4 | Technic Brick 1 x 6 [5 Pin Holes] | Red | 3894 | 389421 | €0,29 |
| 4 | Technic Brick 1 x 12 [11 Pin Holes] | Red | 3895 | 389521 | €0,54 |
| 2 | Brick Round 2 x 2 with Axle Hole | Red | 3941 | 614321 | €0,11 |
| 2 | Bracket 2 x 2 - 2 x 2 | Black | 3956 | 395623 | — |
| 2 | Technic Gear 16 Tooth with Round Holes [Old Style] | Light Bluish Gray | 4019 | 4019194 | — |
| 2 | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) | Black | 4032a | 403226 | €0,06 |
| 2 | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) | White | 4032a | 403201 | €0,06 |
| 2 | Technic Wedge Belt Wheel [aka Pulley] | Light Bluish Gray | 4185 | 6321743 | €0,30 |
| 4 | Technic Pin 1/2 | Light Bluish Gray | 4274 | 4211483 | €0,05 |
| 2 | Motor, 9V Mini [Lightweight New Style] | Light Bluish Gray | 43362c01 | 4274900 | — |
| 1 | Panel 2 x 5 x 6 Wall with Window Stones and 2 Columns Print | Black | 4444pr0008 | 82339 | — |
| 4 | Plate 1 x 10 | Black | 4477 | 447723 | €0,16 |
| 2 | Technic Axle 3 | Light Bluish Gray | 4519 | 4211815 | €0,05 |
| 2 | Technic Worm Gear | Black | 4716 | 471626 | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 11L | Black | 5306bc011 | — | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 17L | Black | 5306bc017 | — | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 33L | Black | 5306bc033 | — | — |
| 1 | Light Brick 1 x 2 with Single Side Light | White | 6035 | 4603220 | — |
| 3 | Technic Axle and Pin Connector Perpendicular | Light Bluish Gray | 6536 | 6261375 | €0,10 |
| 2 | Technic Axle Connector Ridged [with x Hole x Orientation] | Light Bluish Gray | 6538b | 4211543 | — |
| 2 | Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) | Light Bluish Gray | 6553 | 4211536 | €0,19 |
| 2 | Technic Cam | Dark Bluish Gray | 6575 | 4210759 | €0,29 |
| 2 | Technic Axle 3 with Stud | Dark Bluish Gray | 6587 | 4211086 | — |
| 1 | Technic Gearbox 2 x 4 x 3 1/3 | Yellow | 6588 | 658824 | — |
| 4 | Technic Gear 12 Tooth Bevel | Light Bluish Gray | 6589 | 4211539 | — |
| 2 | Technic Beam 1 x 3 Thin | Light Bluish Gray | 6632 | 6360043 | €0,25 |
| 1 | Storage Bin Lid, Dacta, 19 x 24 | Trans-Clear | 71082 | — | — |
| 4 | Rubber Band Small 13mm (Square Cross Section) | Black | 71509 | 4107153 | — |
| 2 | Rubber Belt Small [15mm ID] [Round Cross Section] | White | 85543 | 4544140 | €2,84 |
| 1 | Technic Rubber Belt Medium [26mm ID] [Round Cross Section] | Black | 85545 | 4286126 | — |
| 2 | Sensor, Touch | Light Bluish Gray | 879 | 4492694 | — |
| 1 | Storage / Sorting Tray, Dacta, 34 Compartment for Dacta Small Bin | Trans-Clear | 997251 | — | — |
| 1 | Storage Bin, Dacta, Small | Black | upn0032 | — | — |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/9725-3-robolab-amusement-park-set
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/9725-3-robolab-amusement-park-set