I'm always fascinated by alternative keyboards, especially when they're hand made. Matthew Dockrey [1] has made two of them. The first is based on old print technology, the two-thirds keyboard [2], which involved creating his own keycaps. And then there is his pocket typewriter [3], which is exactly what it is—a manual typewriter that fits in your pocket. It's mad stuff, but it's fantastic at the same time.
[1] https://www.attoparsec.com/
[2] https://www.youtube.com/watch?v=vdP_sTMOWYo