When I was a kid it was not unusual for toys to have a whole mechanical way of creating flashing effects, basically a flint wheel, like on a lighter, behind some colored plastic, and some sort of lever/button to activate the mechanical.
I wanted to find some information on the history of these devices and their use, but I’m having a hard time finding search terms that don’t just give me completely irrelevant results.
Anyone know of a more specific name for them or a manufacturer or similar, or maybe a webpage that tell their history?
