My 7yo doesn't eat what I'd call a lot. My 5yo on the other hand is an absolute hoover with food. He is constantly hungry, like me he eats often, and the amount of food he eats amazes me. He is one of those tall and skinny kids and is very active so I put it down to his metabolism. It is already costing me a fortune - if he comes grocery shopping with me he wants so much fruit it's amazing and he does eat it all. Worse still I rarely have left overs to take to work for lunch anymore because he'll eat everything that's left most nights. I'm dreading feeding him as a teenager.