That's so cool! My 7 year old son wants to knit too.
My DH is not too keen on it because it's not a "boy's" activity. But whatever! My son wants to learn, so "Here's the needles, boy! Have at it!"
I tried starting him on one of those plastic circle knitting wheel things, but he wants to knit like Mom. So I think I will buy him some big plastic needles. Maybe a size 10?