was this thing supposed to come with an altimeter?

Peter turned 6 (weeks) a couple days ago. He is getting bigger and smiles a lot. At a visit with the in-laws over the weekend, we discovered a couple of things.

1) Peter discovered that he can coo. He doesn't do it often yet, but he seems to be pretty happy when he's doing it.

2) Either Tera or her dad noticed that the model baby we got came with an altimeter. Sometimes the act of standing alone is enough to stop him from crying. I understand that sitting might disturb a baby because of accidental movements, but quieting because of the act of standing, even before walking? very bizarre.