re: What age to teach children to cook?

My boys (7&5) always help do pancakes and the like. When master chef jr came on they both got even more excited about it. He doesn't get to use on many things yet and is still obviously working on technique, but the 7 year old got this knife for his birthday. It's pretty well thought out and easy to use. No cuts yet, but if I wasn't watching he may be down a thumb, even with the guard.