With the release of the official Pokemon Go Pokeball, I was feeling a little left out. But, I didn't like how it was so small. I wanted something I could grip in my hands like, well, a Pokeball.
The ball is approximately the size of a billiard/pool ball.
Four printable parts.
Assembly is very straightforward. It is all held together with a bit of paracord and friction. Bungie cord could be substituted just fine too.
If you print the button out of a Clear filament, it should light pipe the LED, though YMMV. To promote more light, I covered parts of the button in aluminum tape to act as a reflector. Ideal would be a turned section of acrylic with a flame polish, but whatev.
Assembly video is here: https://youtu.be/uebdIasJKTE
Great ball version here: https://www.thingiverse.com/thing:3022988
Ultra ball version here: https://www.thingiverse.com/thing:3027704