I discovered on my own a while back that water cooler jugs make pretty good drums. I was fiddling around with one that I had gotten from work for my adult soap box car (it's going to be a pressurized water tank for a squirt gun/water rocket system...), and realized that you could get quite a few interesting sounds out of it.

Naturally there's nothing new with this idea, here are a couple pages with some tips and ideas. The second one even has a little lesson on how to play, and some rhythms you can try.