Electronic cat toy

hey there, im thinking of building an electronic cat toy, i dont really know where to begin, think i want to make something you can hang on a wall or something and plug in or use batteries, batteries would probably be best, and i want it to go on when the cat walks in front of it or something, so maybe some kind of sensor and a motor, just dont really know what i should do, i kinda want to keep it simple, so if anyone has any ideas, let me know. thanks!

anyone? ideas?

Cats love laser pointers.

still looking for help

Cats are also inteligent. They won't touch a toy that doesn't seem to have some kind of intelligence driving it, they're smarter than that, they know when someone's trying to pull one over on them =) Our cat won't touch any of her toys if it's not in a persons hand.

Random laser pointers or toys the jump periodically will bore them quickly. They want interaction not 'toys'.