12 year old DS loves sweet stuff and fizzy drinks. I'm very into healthy food, and constantly push alternatives and make homemade nutritious food for every meal pretty much.
But he's pretty wilful, he's experiencing more independence, walks back and to school/all of his peers eat a load of crap - and so we're in this place where it's really hard to manage/control/steer. Telling him he "can't" is only effective so far.
I wondered how people manage this? Should we give him an allowance per week and when it's used up, it's used up? This would work for out of school stuff, but his lunch and snacks at school come off a prepaid card - theoretically, he could still sneak crap food in as the canteen tills don't itemise everything specifically.