@curved_ruler It is a toy that is no longer so up-to-date today. Fischer Technik. around 1970 and later.

I use these to build turntables that are equipped with lamps or LEDs.

Using different motors. And micro controllers.

With this "equipment" i make a part of the input for the animations.

Exactly this part is no longer available. I assemble this stuff every now and then in a different way.