The books I write and illustrate are honestly for an audience of one; my son. I mainly create these little board books to entertain him and myself through hundreds upon hundreds of re-readings.
This particular idea came from his affinity for slapping, banging and essentially assaulting his books. Some people talk with their hands, well he reads with his fists. So instead of asking him repeatedly to take it easy on The Hungry Caterpillar (sorry Eric Carle), I decided to create a book that encouraged him to get out his baby aggression in a fun way. Plus I've always wanted to draw the old "Where's my thumb" trick.