My brother-in-law went dumpster diving at one of his worksites and came back with a metal box full of stuff which included almost $40 worth of silver dollars among other various junk. He and I and the girls poured through it and he let me keep this. You can move the gentleman's foot and make him hump as fast or slow as you want.
So simple, yet so mesmerizing. Made in Hong Kong.
I'm thinking of wearing it on a chain and seeing how many people notice what it is.