Anyone know what that toy with the little balls that run along the wires is called?

Question

The kind you see in Dr. offices a lot. I want to get one for my son, but I don't know where to look since I don't know what it's called lol.

Answer 1

They are called Bead Mazes.

Answer 2

http://www.rexanne.com/developmental-toy... don't know what they are called in particular but there are a couple of examples there.