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The Evolution of STEM

Snapshot

vs RRP
25% under
Per piece
4.5¢

Value per piece

cost per part at each reference

4.5¢lowest market value

about 50% under retail, which runs ~9.1¢ a piece

Reference

MSRP9.1¢
Used market4.5¢
New market6.8¢
Set Retiring soon · Dec 2026

The Evolution of STEM

Reference
21355-1
Theme
LEGO Ideas and CUUSOO
Year
2025
Parts
879
UPC
673419407663
EAN
5702017824871

The Evolution of STEM is a LEGO set from the LEGO LEGO Ideas and CUUSOO theme released in 2025. It is built from 879 pieces.

New avg$59.99Used avg$39.99MSRP$79.99

Avg. 3rd-party market prices via BrickPicker, not CollectORbuild seller prices

See full valuation & price history →Track its value free →
Value history$59.99▼ -$16.81 (-21.9%)all time
$48$60$72retail $79.99
Jul 4New · used (dashed)Jul 25

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Parts in this set (458)

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A peek at the pile. See the full list, grouped by color, on the parts page.

Sticker Sheet for Set 21355-1Photo shows a different color. This lot is (Not Applicable).1×Animal / Creature Body Part, Claw with ClipPhoto shows a different color. This lot is Black.2×Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small4×Bar 1 x 3 [Clip / Anti-Stud]2×Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]Photo shows a different color. This lot is Black.1×Bar 6L with Stop Ring1×Bar Holder with Clip and 90° Angle (Mechanical Leg)4×Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs2×Brick Round 2 x 2 Truncated Cone1×Brick Sloped 45° 2 x 1 Inverted with 2/3 CutoutPhoto shows a different color. This lot is Black.1×Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version]1×Brick Sloped Double 45° 1 x 11×Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Round Bottom PinPhoto shows a different color. This lot is Black.1×Brick Special 1 x 1 with Headlight4×View all 458 →