This week, Sam turned 18 months old! (Yael turns 3 months old next week, and David is 5 1/2!)
Here is a list of all the words Sam can say or sign, as of today (it seems like new ones come every day!)
Cow (well, he moos)
Daddy (but not Mommy, a whole other issue)
D - for David
Shh - for Yael
Not bad. I think there might be some more that I'm missing...