I think part of it is to do with when we get older, we are bigger so the foods are proportionally smaller. Everyones dad used to buy Wagon Wheels that were actually the size of a wagon wheel and Cream Eggs that would put wouldn't have looked out of place being incubated by a T-rex.
And forget basic walkers anyway, somebody needs to start importing those Tayto crisps from Ireland.
And on the plus side, food prices are apparently dropping, except the foods which I eat that get more expensive every few weeks.