What strikes me is how little incidental exercise everyone now gets. Almost all the children at the toddler groups I go to arrive by car and walk hardly any distance at all. My next door neighbour drives her kids to school even though my DS has been walking the same distance since he was 18 months.
I try to walk or cycle as much as possible and also make DS do the same, but I often feel cruel for making him walk so far (in comparison to other children of his age), and I myself wonder why I bothered slogging my guts out when I get to where I'm going, am one of the few who is knackered out and carrying a tonne of outdoor clothing.
I do think food, cooking and portion control are major issues too, but I think school is very poorly placed to tackle these issues. For one, it's a skewed picture, demonising food. For another, it's a rare child that has much influence over the overall family diet so it's very unfair drumming a message in that a child can't really act on in any meaningful way.
What we could do would be stop breastbeating over whether children can read at age 5 FGS and drastically increase the amount of physical activity in the daily curriculum.