Short update on the design of our companion device. It's composed of one layer of white plexiglass engraved with symbols, one layer of black paper with windows under the symbols, and two layers of wood to hold the LEDs, the speaker, and the wiring. Those layers are held together by a 3 printed plastic case (the one we have currently is slightly too small so we need to change the 3D model). The rest of the electronic (microchip, wifi, music shield, battery) fits in the case under the layers.

All the blueprints for laser cutting the layers and 3D models for printing the case have been uploaded on our Github.