I took the plunge today and taught my 6 year old son to knit.
He listened to my directions. And picked it right up. Within a few minutes he was knitting away. After rest time he asked "Mom? Can I knit some more?"
Handwork is nice quiet way to spend cold afternoons. Of course this came after learning how long an inch was, measuring just about everything and recording it in a book. Plus a good healthy dose of fresh cold air.