# LEGO 9725-1 — ROBOLAB Amusement Park Set (1999)

Source: https://www.brickmissing.com/sets/9725-1-robolab-amusement-park-set
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

Explore the excitement of an amusement park with the ROBOLAB Amusement Park Set (9725-1). This set provides all the bricks and detailed building instructions needed to construct four distinct models. Each creation captures the essence of real-life amusement park attractions, including a thrilling bumper car, a classic merry-go-round, a scenic tour bus, and a spooky haunted house ride. For dynamic interaction, these models are designed to be controlled via the RCX programmable brick and ROBOLAB software. Please note, the RCX programmable brick and ROBOLAB software are not included with this set. This collection is ideally suited for group exploration, recommending one Amusement Park Set for every 3-4 students.

## Set facts

- Set number: 9725-1
- Name: ROBOLAB Amusement Park Set
- Theme: Mindstorms
- Released: 1999
- Pieces: 248
- Distinct part + colour lots: 82
- Build difficulty: easy
- Repairability: 1.2% of this set's lots are hard to replace (1 of 82 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (82 lots, 248 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 | 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 Beam 1 x 4 Thin with Stud Connector | Light Gray | 2825 | 282502 | — |
| 1 | Sensor, Light with Fixed Cable | Black | 2982c01 | 4119421 | — |
| 2 | Motor Pulley, 9V Micromotor with axle hole | Light Gray | 2983 | 298630 | — |
| 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 | Red | 3068b | 306821 | €0,07 |
| 1 | Tile 2 x 2 with Groove | White | 3068b | 306801 | €0,07 |
| 1 | Tile 2 x 2 with Groove | Black | 3068b | 306823 | €0,07 |
| 1 | Tile 2 x 2 with Groove | Yellow | 3068b | 306824 | €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 | Black | 3069b | 306923 | €0,07 |
| 1 | Tile 1 x 2 with Groove | Yellow | 3069b | 306924 | €0,07 |
| 8 | Technic Pin 3/4 | Dark Gray | 32002 | 4109854 | — |
| 8 | Technic Beam 1 x 5 Thin | Light Gray | 32017 | 4106885 | — |
| 2 | Technic Axle Connector with Axle Hole | Light Gray | 32039 | 4106469 | — |
| 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 Gray | 32073 | 4141482 | — |
| 8 | Technic Bush 1/2 Smooth with Axle Hole Reduced | Tan | 32123a | 4206210 | — |
| 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 |
| 2 | Wheel with Split Axle hole | Yellow | 3482 | 348224 | — |
| 2 | Tyre 43 x 17 | Black | 3634 | 363426 | — |
| 3 | Technic Gear 8 Tooth | Light Gray | 3647 | 364702 | — |
| 2 | Technic Gear 24 Tooth [New Style with Single Axle Hole] | Light Gray | 3648b | 364802 | — |
| 1 | Technic Gear 40 Tooth | Light Gray | 3649 | 364902 | — |
| 2 | Technic Gear 24 Tooth Crown with Reinforcements [New Style] | Light Gray | 3650c | 365002 | — |
| 12 | Technic Pin without Friction Ridges Lengthwise | Light Gray | 3673 | 367302 | — |
| 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 Gray | 3713 | 371302 | — |
| 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 Gray | 3743 | 374302 | — |
| 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 Wedge Belt Wheel [aka Pulley] | Light Gray | 4185 | 4100502 | — |
| 4 | Technic Pin 1/2 | Light Gray | 4274 | 427402 | — |
| 2 | Motor, 9V Mini [Lightweight New Style] | Light Gray | 43362c01 | 4176779 | — |
| 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 Gray | 4519 | 4186007 | — |
| 2 | Technic Worm Gear | Black | 4716 | 471626 | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 15L | Black | 5306bc015 | 75565 | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 20L | Black | 5306bc020 | 4100355 | — |
| 2 | Wire with Brick 2 x 2 x 2/3 Pair, 36L | Black | 5306bc036 | 75652 | — |
| 1 | Light Brick 1 x 2 with Single Side Light | White | 6035 | 4603220 | — |
| 3 | Technic Axle and Pin Connector Perpendicular | Light Gray | 6536 | 4173667 | — |
| 2 | Technic Axle Connector Ridged [with x Hole x Orientation] | Light Gray | 6538b | 4100408 | — |
| 2 | Technic Cam | Dark Gray | 6575 | 4157379 | — |
| 2 | Technic Axle 3 with Stud | Dark Gray | 6587 | 4113884 | — |
| 1 | Technic Gearbox 2 x 4 x 3 1/3 | Yellow | 6588 | 658824 | — |
| 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 Gray | 879 | 4107716 | — |
| 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/9725-1-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/9725-1-robolab-amusement-park-set