I think that the jokes kids come up with are marvelous. Usually the jokes are inspired by whatever the kids are into at the moment and are delightfully funny, so I was hooked when I found this site.
Jokes by Kids
Geezer Guff: for funny & feisty seniors
Geezer Guff - a fun and informative site for seniors.
GRiN
An awesome site of jokes and riddles that will make you laugh and entertain your brain.