Every mad scientist’s lair needs an unusual light switch! I’ve had my eye on this one for years, but between printer size and reliability issues, I hadn’t had a chance to make this one until recently.
This one is actually someone’s remix of one that has been on Thingiverse for years. I think it came out really well. I had to use a bit of tack on the switch to get the “nubbin” to stay on well.
You can find the files (again, not mine) here:
Frankenstein Light Switch Redux 1.0 by Muckychris

I think there is a bit of a gap between the plate and the wall, so I’m probably going to put some weather stripping on the back for a cleaner appearance.
“IGOR! Where did we put those brains again?”