45521-1

Computer Science & AI Kit 3-5

Set number: 45521-1
Year: 2026
Theme: Educational and Dacta
Parts: 321
Minifigures: 4

Building instructions

The building instructions are on the official LEGO website. We do not host any instructions ourselves; the link below takes you to the official page.

View building instructions on LEGO.com (opens an external website)This set on Rebrickable (opens an external website)

Minifigures

fig-015666Monochrome Blue1×3 parts
fig-015657Monochrome Bright Green1×3 parts
fig-016692Monochrome Bright Light Orange, 28621 Head1×3 parts
fig-015664Monochrome Red, 28621 Head1×3 parts

Parts list – 45521-1 Computer Science & AI Kit 3-5

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85 lines, 309 pieces

Parts list of set 45521-1
Part	Name	Colour	Quantity
46212	Brick 1 x 2 x 5 without Side SupportsBricks	Trans-Purple	4×
3003	Brick 2 x 2Bricks	Coral	4×
3003	Brick 2 x 2Bricks	Dark Purple	4×
3003	Brick 2 x 2Bricks	Dark Turquoise	4×
3003	Brick 2 x 2Bricks	White	4×
3001	Brick 2 x 4Bricks	Blue	2×
3001	Brick 2 x 4Bricks	Bright Light Orange	2×
3001	Brick 2 x 4Bricks	Dark Purple	4×
3001	Brick 2 x 4Bricks	Dark Turquoise	4×
3001	Brick 2 x 4Bricks	Green	2×
3001	Brick 2 x 4Bricks	Medium Lavender	4×
3001	Brick 2 x 4Bricks	Red	2×
2456	Brick 2 x 6Bricks	Dark Purple	4×
3007	Brick 2 x 8Bricks	White	4×
42022	Brick Curved 6 x 1Bricks Curved	Black	4×
5489	Brick Round 2 x 2 D. Tube with 45° Elbow and Axle Holes (Crossholes) at Each End [LONG]Bricks Round and Cones	Trans-Purple	4×
3941	Brick Round 2 x 2 with Axle HoleBricks Round and Cones	Trans-Clear	4×
59900	Cone 1 x 1 [Top Groove]Bricks Round and Cones	Trans-Purple	8×
4286	Brick Sloped 33° 3 x 1Bricks Sloped	White	4×
3298	Brick Sloped 33° 3 x 2Bricks Sloped	Dark Purple	4×
3040b	Brick Sloped 45° 2 x 1 with Bottom PinBricks Sloped	Trans-Purple	6×
4287c	Brick Sloped Inverted 33° 3 x 1 with Internal Stopper and No Front Stud ConnectionBricks Sloped	Black	4×
3665	Brick Sloped Inverted 45° 2 x 1Bricks Sloped	Coral	4×
44865	Brick Special 1 x 2 with Pin - Bottom Stud HolderBricks Special	White	4×
6232	Brick Special 2 x 2 with Pin and Axle HoleBricks Special	Black	4×
39789	Brick Special 2 x 4 with 3 Axle HolesBricks Special	Black	4×
30592	Brick Special 2 x 4, with 2 x 2 Brick with Top Pin and 1 x 2 Side PlatesBricks Special	Light Bluish Gray	2×
112174	Technic Brick 2 x 4 with 4 Pin Holes, 2 PinsBricks Special	White	4×
118091	Motor 10 x 6 x 3, ScienceElectronics	White	1×
118092	Sensor, Colour, ScienceElectronics	White	1×
114253	USB CableElectronics	White	1×
6126b	Wave / Flame Rounded with Base RimEnergy Effects	Trans-Light Blue	4×
6126b	Wave / Flame Rounded with Base RimEnergy Effects	Trans-Orange	4×
119190	Activity Card ? for Science KitsGear Parts	[No Color/Any Color]	1×
3565	Plant, Leaf 2 x 6 x 1 with 2 StudsPlants & Trees	Trans-Clear	4×
2445	Plate 2 x 12Plates	White	4×
3020	Plate 2 x 4Plates	Coral	4×
3795	Plate 2 x 6Plates	Dark Turquoise	4×
3034	Plate 2 x 8Plates	Dark Purple	4×
2654	Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Plates Round Curved and Dishes	Light Bluish Gray	6×
60474	Plate Round 4 x 4 with Pin HolePlates Round Curved and Dishes	White	4×
68568	Plate Round Corner 3 x 3 with 2 x 2 Round CutoutPlates Round Curved and Dishes	Dark Turquoise	4×
68568	Plate Round Corner 3 x 3 with 2 x 2 Round CutoutPlates Round Curved and Dishes	White	4×
5251	Plate Round Corners 8 x 16 x 2/3 Circle with Reduced KnobsPlates Round Curved and Dishes	Dark Turquoise	1×
66790	Plate Round Corners 8 x 8 x 2/3 Circle with Reduced KnobsPlates Round Curved and Dishes	Dark Purple	3×
44728	Bracket 1 x 2 - 2 x 2Plates Special	Dark Purple	6×
99207	Bracket 1 x 2 - 2 x 2 InvertedPlates Special	Dark Turquoise	4×
15208	Plate Special 1 x 2 with Three Teeth [Tri-Tooth]Plates Special	White	4×
41740	Plate Special 1 x 4 with 2 Studs with Groove [New Underside]Plates Special	Dark Purple	4×
7769	Plate Special 1 x 4 x 2/3 with 1 x 2 Bottom CutoutPlates Special	Coral	4×
109373	Plate Special 2 x 2 with Rubber FootPlates Special	Black	4×
71752	Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale)Plates Special	Light Bluish Gray	6×
5518	Plate Special 2 x 3 with Cloud EdgePlates Special	Dark Turquoise	4×
40687	Plate Special 2 x 4 with Pins, ReinforcedPlates Special	Light Bluish Gray	2×
32059	Wedge Plate 4 x 6 Cut CornersPlates Wedged	Black	2×
50303	Wedge Plate 7 x 6 Boat Bow with Stud NotchesPlates Wedged	White	4×
85544	Technic Rubber Belt Medium [24mm ID] [Round Cross Section]String, Bands and Reels	Red	2×
32062	Technic Axle 2 NotchedTechnic Axles	Red	4×
4519	Technic Axle 3Technic Axles	Yellow	6×
3705	Technic Axle 4Technic Axles	Black	2×
32073	Technic Axle 5Technic Axles	Light Bluish Gray	2×
3706	Technic Axle 6Technic Axles	Red	2×
3700	Technic Brick 1 x 2 [1 Pin Hole]Technic Bricks	Dark Turquoise	4×
32064a	Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom PinTechnic Bricks	Coral	4×
3701	Technic Brick 1 x 4 [3 Pin Holes]Technic Bricks	White	4×
3894	Technic Brick 1 x 6 [5 Pin Holes]Technic Bricks	Black	4×
3702	Technic Brick 1 x 8 [7 Pin Holes]Technic Bricks	White	4×
7469	Technic Brick 5 x 6 Right Angle DoubleTechnic Bricks	White	2×
59443	Technic Axle Connector Smooth [with x Hole + Orientation]Technic Connectors	Coral	4×
7332	Gear Box 4 x 4 x 2 for Gear TrackTechnic Gears	Trans-Clear	2×
7334	Gear Track Curve 90° 17 1/2 x 17 1/2Technic Gears	White	2×
7333	Gear Track Straight 3 x 16Technic Gears	Dark Purple	2×
32270	Technic Gear 12 Tooth Double BevelTechnic Gears	Black	2×
18575	Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]Technic Gears	Tan	2×
32498	Technic Gear 36 Tooth Double BevelTechnic Gears	Black	2×
3673	Technic Pin without Friction Ridges LengthwiseTechnic Pins	Yellow	12×
7335	Pulley, 2-StageTechnic Special	Black	2×
6636	Tile 1 x 6 with GrooveTiles	Coral	4×
14769pr9967	Tile Round 2 x 2 with Black Circle, White Circles / Eye PrintTiles Round and Curved	White	12×
66857	Tile Round 2 x 4Tiles Round and Curved	Black	4×
15535	Tile Special Round 2 x 2 with HoleTiles Special	Dark Turquoise	4×
96874	Brick and Axle Separator v2.0Tools	Dark Turquoise	1×
32580	Axle Hose, Soft 7LTubes and Hoses	Black	4×
5253	Wheel Smooth 24 x 14mm with Pin HoleWheels and Tyres	Black	2×
112175pat0001	Wheel with 4 Spokes with 2 Holes, 4 Inserts and Black Integral TireWheels and Tyres	Black	2×