So Harmon loves books, and currently is into The Very Hungry Caterpillar. I think he loves it both because he loves to eat and putting your finger in the holes of the food while making a smacking sound is pretty fun.
This morning he was playing with Aaron's notebook and was making smacking sounds while pretending to draw on it with a pen. I thought it was funny, but then realized he was putting his fingers in the holes of the notebook, just like the caterpillar. Aaron and I had a good giggle.