Aiden's Brother Noah

Aiden's brother Noah is 3 1/2 years old. Noah is hearing, and was born 2 days late, weighting 10 pounds, 3oz - I guess we like to do things at extremes!
I'm not sure how much Noah understands about Aiden's hearing. He knows that Aiden puts hearing aids on to hear better, and he knows that Aiden goes to a lot of appointments about his hearing, but still talks as if Aiden can hear him. Noah calls out to Aiden to try and get his attention (and gets frusterated when Aiden doesn't respond!).
Noah is doing amazingly well with Sign Language (although he doesn't understand why our ASL [American Sign Language] teacher doesn't speak aloud to him :>). I think Noah probably knows about 20 signs, and you really only have to show him once what a sign is and he will remember it. Plus, Noah is constantly asking, "how do you spell sign language for" this, that and another thing.
I think that Noah is going to be a great help to Aiden (and the rest of us!) once Aiden starts his AV Therapy post implant switch on. Noah already plays 'listening' sound games with Aiden, and really seems to get the fact that we are trying to teach Aiden what noises different things make. Plus, Noah is a regular chatterbox - I think he talks non-stop from the time he gets up until the time he goes to bed. That much exposure to a spoken language can't help but be good for a post-implant Aiden!
I think Noah and Aiden will be great friends (as long as Aiden stays away from Noah's trucks and tools...). Now that Aiden is starting to walk, Noah takes great joy in trying to get Aiden to chase him around the kitchen table :>