Low level of sugar in the blood (hypoglycemia) can make someone feel edgy and anxious, even downright panicky, as is cause adrenaline to be released in the body. Ensure your child’s levels stay fairly steady during the day by avoiding sweet or sugary snacks that will produce a fast blood –sugar high and cause it to plummet. Bananas, nuts, whole meals sandwiches and health bars low in refined sugar are all good ‘steady – sugar- release’ options.