The Evolution of STEM (21355-1) is a LEGO Ideas and CUUSOO LEGO set released in 2025 with 879 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. This set includes 3 minifigures and 365 unique part types.
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Building instructions
Official LEGO instructions — read on BrickID
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Minifigures in The Evolution of STEM
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Parts in this set
365 parts · page 1 of 8 · updating…
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Animal / Creature Body Part, Claw with Clip3171 · ×2 · Black -
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small53451 · ×4 · Black -
Animal Body Part, Horn Stacked 45 deg. with Axle Connectors2142 · ×1 · Reddish Brown -
![Bar 1 x 3 [Clip / Anti-Stud]](https://cdn.rebrickable.com/media/parts/elements/4141580.jpg)
Bar 1 x 3 [Clip / Anti-Stud]4735 · ×2 · Black -
Bar 1L / Stem with 3 Sprouts/Prongs68211 · ×1 · Bright Green -
Bar 1L / Stem with 3 Sprouts/Prongs68211 · ×1 · Reddish Brown -
![Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]](https://cdn.rebrickable.com/media/parts/elements/6439039.jpg)
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]3484 · ×1 · Black -
![Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]](https://cdn.rebrickable.com/media/parts/elements/6439053.jpg)
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]3484 · ×3 · Reddish Brown -
Bar 2L with Stop in Center78258 · ×1 · Reddish Brown -
Bar 2L with Towball22484 · ×3 · Orange -
Bar 2L with Towball22484 · ×3 · Dark Azure -
Bar 3L87994 · ×1 · Dark Green -
Bar 6L with Stop Ring63965 · ×1 · Pearl Gold -
Bar 6L with Stop Ring63965 · ×1 · Black -
Bar Curved with Axle End and 1 x 1 Round Plate4042 · ×3 · Trans-Clear -
Bar Holder with Clip11090 · ×2 · Flat Silver -
Bar Holder with Clip and 90° Angle (Mechanical Leg)72869 · ×4 · Black -
Bar, Angled with 1 x 1 Round Plate / Stud on End65578 · ×2 · Trans-Clear -
Bar, Angled with 1 x 1 Round Plate / Stud on End65578 · ×1 · Light Bluish Gray -
Bar, Angled with 1 x 1 Round Plate / Stud on End65578 · ×1 · Green -
Bar, Ring 7L Diameter, with 2 Axle Connectors79851 · ×1 · Black -
Bracket 1 x 1 - 1 x 136841 · ×1 · White -
Bracket 1 x 1 - 1 x 1 Inverted36840 · ×1 · White -
Bracket 1 x 1 - 1 x 2 Inverted73825 · ×2 · Reddish Brown -
Bracket 1 x 1 - 1 x 2 Inverted73825 · ×1 · Dark Bluish Gray -
Bracket 1 x 2 - 1 x 299781 · ×1 · Black -
Bracket 1 x 2 - 1 x 299781 · ×1 · Dark Turquoise -
Bracket 1 x 2 - 1 x 2 Inverted99780 · ×2 · Dark Orange -
Bracket 1 x 2 - 1 x 2 Inverted99780 · ×6 · Reddish Brown -
Bracket 1 x 2 - 1 x 2 Inverted99780 · ×2 · Dark Blue -
Bracket 1 x 2 with 1 x 2 Vertical Studs4585 · ×1 · Black -
Bracket 2 x 2 with 1 x 2 Vertical Studs41682 · ×1 · Black -
Bracket 2 x 2 with 1 x 2 Vertical Studs41682 · ×1 · Tan -
Bracket 3 x 2 x 1 1/3 with Bottom Stud Holder73562 · ×1 · Tan -
Brick 1 x 13005 · ×2 · Dark Turquoise -
Brick 1 x 13005 · ×2 · Reddish Brown -
Brick 1 x 23004 · ×2 · White -
Brick 1 x 43010 · ×8 · Tan -
Brick 1 x 63009 · ×2 · Dark Bluish Gray -
Brick 1 x 83008 · ×4 · Tan -
Brick 2 x 23003 · ×4 · White -
Brick 2 x 2 Corner2357 · ×4 · Tan -
Brick 2 x 33002 · ×1 · Dark Bluish Gray -
Brick 2 x 43001 · ×1 · White -
Brick 2 x 62456 · ×2 · Medium Nougat -
Brick 2 x 62456 · ×2 · Tan -
Brick and Axle Separator v2.096874 · ×1 · Orange -
Brick Arch 1 x 34490 · ×1 · Dark Bluish Gray