Now for something a little cheerier... beavers! More here, here, and here. I've also found some games for beavers, like Beaver, Beaver Come Out And Be Fed, which features this chant:
Beaver, Beaver, come out and be fed,
First your tail and then your head.
Bring your Mama and your Papa,
We'll feed you fried bacon.

And get your filthy minds out of the gutter this instant.