I made a Simon Says toy with Clem over a couple of weekends. Started with an OKdo project and customised the code to fix some quirks and add our own musical touches (it plays Nazareth from Nativity (2009) every few levels).
We built it in a metal guitar pedal case using some arcade buttons and a speaker I had lying around from audio.computer experiments. It turned out to need a lot of wires, but that was a good excuse to teach Clem how to use a wire stripper and a soldering iron. Useful life skills…
I put our code up on Github in case anyone is tempted to tinker.