The cow says "moo", the cat says "meow" and Kevin says "bah bah"?

Kevin and Ryan are learning what all the animals say. They love reading books and have come to say "bookie" when they want to be read to. However, you can be pretty sure when Kevin says "bah bah", he is referring to Ryan. Kevin says "bah bah" for brother and you will hear him say it when he is looking for Ryan. The other day they were napping and Ryan got up a few minutes before Kevin. I brought Ryan out to the living room. I heard Kevin talking so I went in to get him. He was standing up in his crib, peeking over into Ryan's crib and yelling "bah bah" as he was looking for him. How cute is that?