Encourage a wide variety of food. It is excess of requirements that is not good. I suppose alcohol is a good example for adults. Food and nutrition feature in the core subject Science and foundation subjects Design and Technology, Geography and History. The statutory orders state that 'pupils should use a variety of domestic and environmental context as starting points for learning science'.
Science is the stuff of everyday life.
Take a wet, runny, grey looking, tasteless mixture finding its own dull flat surface going into a tin. I has increased in size, it has changed its colour to a lovely golden brown. It is light, puffy and airy. When cut it is crisp on the outside, soft in the middle and delicious. This is science - the effect of heat ATI scientific investigation.