We're on our way to Mexico and on our flight we were feeding Cam slices of peaches. Cam dropped a slice onto the floor and he says:

Uh oh!

His first words!  Soooo cute.  I guess the toddlers at his daycare say this so he's picked it up.  It's a great parlour trick, too - we say "uh oh" and says it back.  I got a video of it, will post when I get back from Mexico...