K.A.
My oldest son got one as a present from his grandparents one year because he loved to help cook. I can't remember how old he was. We made a few mixes that came with it, it took as long to bake those little cakes as it would to bake a full sized one! The pans it came with rusted super fast and had to be thrown out. It's sitting on a shelf and hasn't been touched in years because I keep forgetting to buy new replacement pans for it which means it's useless.
I have to agree with the other posters in getting kids sized cooking gear. You can find super cool Mickey Mouse kitchen stuff or something else that is fun. Get a kids cookbook, Rachel Ray has one, we've got a Dr Seuss one and a couple Star Wars ones.