Here is a Light box designed with Blue from Blue's Clue. Included in the zip file are individual STL files for each color. When imported into bambu studio or similar slicer, import them as a single object and then assign the desired colors. The face is .6mm thick to allow for good light penetration. There is a rear cover with a 15mm x 10mm cutout to allow for easy wiring of LED lights.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.