He's also recently started making "yummy" noises when he eats. If he's eating something he thinks is especially delicious (like chicken) he'll take a bite and then go "MMMM!! MNOMNOMNOM!" Case and point:
He was also getting a kick out of drinking water out of the cap of an old chapstick. I don't know what it is about kids and tiny things, but he sure thought it was hilarious.