My boy will be 16 months old this month. Ever since he's been old enough for us to put him in his own crib and go to sleep on his own, I've done the same thing every time I put him down. I giev the sign for "I love you" and tell him "I love you," then I give him the "rock on" sign \m/ and say "Rock on!"
He's been mumbling for a while. He says Moma and daddy and a few other words. He's been giving a mumble "I love you" for a while. This morning, for the first time, he raised his fist and said "Rock on!"
I am so happy.