I modified a small lighting ball with magnet.
It is pretty useless but fun!!!

You can stick it on each metal surface!!! like a belt metal buckle maybe quiet ridiculous but always fun!!!

Step 1: Insert Magnet

I modified switch and I replaced it by 2 strong and small magnets.
Nothing really complicated but to weld magnets, it is boring because it is attracted by your soldering iron.

Then I set magnets on the surface with glue and in fact I put a lot of glue!!!