Fun stuff

These little displays consist of an oval shaped PCB with an STC STC8G1K08 microcontroller and USB-C port on the back, and 40 tiny 2020 sized RGB LEDs and a tiny clicky tactile switch on the front....

This big glass (not plastic, like some cheap ones) crystal is 12cm long by 2.8cm wide and 1.5cm thick and works like a prism. However, it is coated with a special layer that helps it create all sorts...