1) I think Jayanna's idea for a Wobbly Gym is great.
2) I guess about half my diet is now 'junk food'. I really don't enjoy time in the kitchen with all the washing up, etc. I buy items such as prepared chicken dishes, etc from a supermarket, after checking sugar, salt and overall calorie content, stick them in the microwave and eat with a huge helping of salad with nuts and seeds. The advantage is that I can actually keep an eye on how many calories I'm eating. At other times I eat an omelette, chop or fish plus salad. It depends what people mean by 'junk food'. I don't accept that fresh is necessarily best - it depends what you put in it. Most of my food is low carb/high fat. I rarely eat bread, pastry, potatoes, pasta, rice or cake.
3) There is a very close correlation between socio-economic status and weight, particularly with women. Maybe we should try to understand why poorer women seem to be fatter. I could make a guess, but I don't know.
PS. I'm not overweight.