By popular request, here's the famous I Can Walk Like a Penguin commercial for the New England Aquarium. I didn't remember the little girl being quite so spastic.
Also, in my faulty memory, the "what makes an ocean wave wave" boy appeared in the same commercial. Not true. Here he is, pimping the Museum of Science: It's fun to find out. Hah! When I was a kid, hearing my own voice on those phones freaked the hell out of me.