The Monster's Monster by Patrick McDonnell

There once was three monsters that thought they were each the meanest, strongest, babbest monsters.  They decided to create a new monster.  This monster will be biggest, baddest monster.  But the three are shocked when the monster finally speaks, ""Dank you!"  The three monsters leave adults (and their care givers.)  The three monsters learn an important lesson and decide maybe being biggest and meanest monster is not..

Text:  4 Buckeye leaves
Illustrations:  4 Buckeye leaves