Rare parts in 21355-1: The Evolution of STEM
This set inventory has been obtained from LEGO Customer Services replacement parts page. It was retrieved on 28 July 2025 and contains 876 pieces.
Important note: We do not control this inventory and cannot currently make changes to it. Use it as a guide to the contents of the set, or to find out part numbers when requesting replacements.
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| Element | Image | Qty | Colour | Category | Design | Element name | Element in sets |
Element introduced in |
Design in sets |
Design introduced in |
|---|---|---|---|---|---|---|---|---|---|---|
| 6527761 |
|
2 | Aqua | Plates | 111402 | FLAT TILE 1X2, NO. 483 | 3 | 2025 | 3 | 2025 |
| 6541885 |
|
1 | Black | Cables, Hoses & Strings | 112938 | OUTER CABLE 200 MM | 2 | 2025 | 2 | 2025 |
| 6546834 |
|
1 | Black | Minifigure Parts | 76382 | MINI UPPER PART, NO. 7575 | 1 | 2025 | 10116 | 1993 |
| 6544403 |
|
6 | Brick Yellow | Bricks | 6806 | BRICK 2X6X1, INV. ARCH | 1 | 2025 | 13 | 2025 |
| 6544404 |
|
12 | Brick Yellow | Bricks | 5907 | BRICK 1X2X1 2/3, BOW W/ CUTOUT, NO. 1 | 2 | 2025 | 28 | 2024 |
| 6544405 |
|
4 | Brick Yellow | Bricks | 6801 | BRICK W/ BOW 1X6X1 | 1 | 2025 | 9 | 2025 |
| 6537695 |
|
6 | Bright Blue | Connectors | 5264 | 3.2 HOLDER, W/ KNOB | 2 | 2025 | 65 | 2025 |
| 6548959 |
|
5 | Bright Bluish Green | Connectors | 59443 | CROSS AXLE, EXTENSION, 2M | 1 | 2025 | 1851 | 2005 |
| 6468472 |
|
1 | Bright Green | Plates | 106298 | FLAT TILE 1X1, NO. 304 | 1 | 2025 | 1 | 2025 |
| 6531638 |
|
22 | Bright Red | Technic Beams | 7244 | BEAM 2M, W/ CROSS AXLE | 1 | 2025 | 5 | 2025 |
| 6544408 |
|
3 | Dark Azur | Connectors | 67692 | 3.2 SHAFT W/ 5.9 BALL | 2 | 2025 | 211 | 2017 |
| 6352997 |
|
1 | Medium Stone Grey | Plates | 79403 | FLAT TILE 2X2, ROUND, NO. 1211 | 3 | 2021 | 3 | 2021 |
| 6530023 |
|
1 | Multicombination | Minifigure Accessories | 2608 | MINI BOTTLE, W/ KNOB | 3 | 2023 | 7 | 2018 |
| 6488484 |
|
1 | Reddish Brown | Plates | 1751 | TILE 4X4 | 2 | 2024 | 79 | 2022 |
| 6492629 |
|
1 | Reddish Brown | Minifigure Accessories | 1941 | HANDLE, NO. 4 | 3 | 2024 | 31 | 2022 |
| 6546832 |
|
1 | Reddish Brown | Minifigure Parts | 76382 | MINI UPPER PART, NO. 7574 | 1 | 2025 | 10116 | 1993 |
| 6510154 |
|
1 | Reddish Brown | Connectors | 5489 | DESIGN ELEMENT,DEG.135,W/ CROSSHOLE,NO.3 | 3 | 2024 | 29 | 2024 |
| 6483787 |
|
5 | Reddish Orange | Connectors | 59443 | CROSS AXLE, EXTENSION, 2M | 2 | 2024 | 1851 | 2005 |
| 6546844 |
|
1 | Sand Green | Minifigure Parts | 76382 | MINI UPPER PART, NO. 7576 | 1 | 2025 | 10116 | 1993 |
| 6547112 |
|
1 | Sand Yellow | Minifigure Parts | 5958 | MINI WIG NO. 13 | 3 | 2025 | 10 | 2021 |
| 6527760 |
|
1 | Transparent | Plates | 111401 | FLAT TILE 1X1, ROUND, NO. 344 | 1 | 2025 | 1 | 2025 |
| 6548957 |
|
2 | Transparent | Animals & Nature | 3565 | LEAF 2X6X1, NO. 1 | 1 | 2025 | 53 | 2023 |
| 6581707 |
|
1 | Transparent | Bricks | 35343 | PYRAMID RIDGED TILE 1X1X2/3 | 3 | 2025 | 128 | 2017 |
| 6527753 |
|
1 | Umber Brown | Minifigure Parts | 111394 | MINI HEAD, NO. 4570 | 1 | 2025 | 1 | 2025 |
| 6544409 |
|
5 | Vibrant Coral | Connectors | 59443 | CROSS AXLE, EXTENSION, 2M | 3 | 2025 | 1851 | 2005 |
| 6490255 |
|
1 | White | Minifigure Parts | 77601 | MINI LOWER PART | 3 | 2024 | 29 | 2021 |
| 6507816 |
|
1 | White | Miscellaneous | 1762 | DESIGN ELEMENT 2X2X2/3, NO. 1 | 2 | 2025 | 26 | 2022 |
| 6527759 |
|
1 | White Glow | Plates | 111400 | FLAT TILE 1X1, NO. 334 | 2 | 2025 | 2 | 2025 |