[Dean]

Originally Posted by sperry

They're called wood blocks.

http://en.wikipedia.org/wiki/Wood_block

That is probably what they are.

I remember seeing what I thought were hollow wooden percussion instruments that looked like slightly square PacMen heads. I thought that might have been what the sound was coming from. Now that I think about it though, there were few of those of different sizes and they were setup like a drum set sort of.