His favorite part is when the Momma calls the Doctor and the Doctor said "NO MORE MONKEYS JUMPING ON THE BED!", and he wags his finger at me and says "No No No".
Last night we were reading a different book with lots of everyday things labeled. We named the baby's eyes and ears; we named the dog, which goes "woof"; we named the cow, which goes "moooo"; and we named the monkey, which goes ... "No No No."
And then he didn't understand why we were laughing at him.