This was my favorite when I was a kid. (I have specific memories, too, of being in the public library kid area and playing with a wooden puzzle with Eric Carle's caterpillar and pieces of fruit, while my mom filled out little pink cards for each of the library books we were going to take home that day. Anyone else remember when we had to do that?) 
 It held up well, too. My own kiddo likes counting the fruits, poking his fingers in the holes the caterpillar eats through the pages, and the grand finale makes him smile (possibly because I make the entire book flap like a butterfly). 
 On its own, this would be 4 stars, but the nostalgia factor bumps it up to a 5.