probs not. Don't get me wrong your brother is good for being 11, hell he is doing some shit i can't do and i'm twice his age, but sponsorship requires quite a bit of style and you really have to be able to offer an image to whoever you're gonna get sponsored by. Most kids around me who are sponsored are doing crazier stuff with great style, not to say your brother won't get there, just to say he needs to keep working if he wants to. It seems like he is really stoked on skiing though, so that's the good part. Keep it up!