Dunno what they're called, but we have one at the cinema foyer, and another in the mall.

I remember one time I got a plastic watch type thing with silver balls in it. It wasn't a working watch, but a little mini puzzle maze thing. It was ages ago, so I'm surprised I remember it. I think it was actually 10p. One of the old chunky ones.

Maan, I'm oooooold...