LEGO 21355
The Evolution of STEM

LEGO 21355 The Evolution of STEM box image
Set number
21355
Theme
LEGO Ideas and CUUSOO
Pieces
879 pcs
Year
2025
Used & parts
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“The Evolution of STEM” is LEGO® “LEGO Ideas and CUUSOO” theme set number 21355. Released in 2025, it has 879 pieces. With Re:GO you can automatically work out what percentage of this set you can build from the LEGO parts you already own, along with the missing parts and an estimated cost. Use the links below to compare prices on Amazon, Rakuten, Yahoo! Shopping, Mercari and Yahoo! Auctions, and find the best deal on new, used, or individual parts.

Part breakdown 365 types

Color split (most first)
Black×166
Tan×152
Reddish Brown×56
White×55
Red×55
Dark Red×52
Light Bluish Gray×41
Bright Green×38
Medium Nougat×37
Blue×28
Dark Bluish Gray×27
Trans-Clear×25
Main parts (most used first)
7244 Technic Beam 1 x 2 with Axle on Side
Red · ×22
18654 Technic Pin Connector Round 1L [Beam]
Red · ×20
42924 Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot
Blue · ×20
15068 Slope Curved 2 x 2 x 2/3
Tan · ×15
32607 Plant, Plate 1 x 1 Round with 3 Leaves
Bright Green · ×13
2412b Tile Special 1 x 2 Grille with Bottom Groove
Light Bluish Gray · ×12
5907 Brick Curved 1 x 2 x 1 2/3 with 1 Cutout
Tan · ×12
32062 Technic Axle 2 Notched
Black · ×11
78329 Plate 1 x 5
Tan · ×10
5264 Plate Round 1 x 1 with Hollow Stud and Underside Clip
Black · ×9
3010 Brick 1 x 4
Tan · ×8
4162 Tile 1 x 8 with Groove
Dark Red · ×8
87580 Plate Special 2 x 2 with Groove and Center Stud (Jumper)
Dark Red · ×8
3023 Plate 1 x 2
Tan · ×7
3023 Plate 1 x 2
Dark Brown · ×6
3069b Tile 1 x 2 with Groove
Tan · ×6
3386 Plate 1 x 1 x 2/3 Half Round with Side Stud
Black · ×6
3710 Plate 1 x 4
Tan · ×6
5264 Plate Round 1 x 1 with Hollow Stud and Underside Clip
Blue · ×6
60479 Plate 1 x 12
Black · ×6
6806 Slope Curved 2 x 6 Inverted
Tan · ×6
98138 Tile Round 1 x 1
Light Bluish Gray · ×6
99780 Bracket 1 x 2 - 1 x 2 Inverted
Reddish Brown · ×6
24246 Tile Round 1 x 1 Half Circle
Light Bluish Gray · ×5

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