Three Cheers for Tacky by Helen Lester
Tacky is a freak penguin who can't seem to do anything right. In a cheer competition where uniformity is key, Tacky produces hilarious results!

Sylvester and the Magic Pebble by William Steig
A donkey named Sylvester finds a magic pebble and accidentally turns himself into a rock! This Caldecott winner was written by the same author who gave us Shrek.