39 Uses For a Friend by Harriet Ziefert

Super simple book filled with pictures of things friends can do.  My favorite one is "napkin" which shows one kid wiping his hands on his friend's sleeve.

 

The Dumb Bunnies Go to the Zoo by Sue Denim and illustrated by Dav Pilkey

A family of idiotic pink rabbits take a trip to the zoo and wreak havoc.  There's a gold medal on the front cover that says: This book is too dumb to win an award."  I agree :o)

 

Louis the Fish by Arthur Yorinks and illustrated by Richard Egielski

Yet another WTF book here!  A third generation butcher who hates his job turns into a giant salmon in this weird picture book.

 

Cockatoos by Quentin Blake

Quentin Blake illustrated the Roald Dahl books I read as a kid.  Professor DuPont has 10 Cockatoos and one day they all escape through a broken window.  He spends the entire day looking for them and the next day they show back up where they're supposed to be.