This LED clips are creating for children can customize inside of sheet between dumper Gel.
It require 25mm x 25mm x 3mm or more larger but thickness should be 3mm or adjust by yourself in this STL customize.
In addition you may need M2 x 8mm screw,
Using 2 parts of this and also WS2812B NEO PIXEL RGB board (10mm round).
Cut from paper as mark for core and sand with 2 of dumper Gels.
LED parts are tied with serial wiring and control by Arduino or any other controller for it.

QIDITECH X-ONE

0.2mm