I've been tasked with creating a Rube Goldberg machine that employs mechanical, chemical, and electric components as a school project. I've got ideas ready for the two former topics, but I'm stuck on what to make of the electrical category. The rules of the project state that I cannot use any computers or integrated circuits, but I'd still like to have something creative and effective in the machine. I am allowed to use batteries (up to 10 V) and battery-operated motors.
The purpose of the machine is to move golf balls from their original positions to activate the next portion of the reaction, so lateral movement, lifting, and dropping are all valid options. My main concern is that I'll end up using just switches activated by the golf balls and not anything more complex or varied. Have any ideas on what I could implement into the box?