I began writing in the 4th grade. As a matter of fact, I produced a play for the entire school. It was about Leif Ericson and the discovery of America.
Like anything, you don't force kids to cook. It just becomes part of life - have them be around it, keep them informed - talk about it. I try to relay my passion for it in these ways. The second you try to force anything on your own kid, they rebel.