I have been doing a burning dried food experiment for the past couple of years - linked to the amount of energy in each food. They set fire to small piece of dried food in a candle flame. I always use crisps, dried banana, pasta and sometimes toast. I often give them moist banana to show that it doesn't burn. They only burn a small amount, roughly the same size of each one. The dried banana wins hands down every time, with the crisp second. However, when you look on the back of food labels, energy per 100g, crisps have much more as well as a higher content of fat. Surely this should burn longer? I have always explained this in the past as the banana having lots of "slow release" energy as opposed to crips. Can anyone explain this in simple terms - it is for primary children and 'keeping healthy' - or perhaps suggest changes to this experiment.