My book, FREAKY, FUNKY FISH is a rhyming, nonfiction PB with humor. :-)
Does Heather Montgomery's BUGS DON'T HUG rhyme? I think it does. . . and I think is considered more informational fiction vs. nonfiction.
WATER IS WATER by Miranda Paul is a concept PB that rhymes, though it's not humorous.
I'll let you know if I think of others!