bah = ball
buh = bug
buh = bird
buh = anything else that he points to
guh-buh = garbage
buh-guh-buh-guh-buh = your guess is good as mine
ti-ti-ti = tickle tickle
muh, muh = meow, meow
da = down
nah, nah = nurse, or what a goat says
He also signs “more” and “all done” and makes a dog noise with his mouth closed.