 The goal of this study is to evaluate the effects on short-term neuropsychological functioning of: a consumption of breakfast versus no breakfast 2 different breakfast meals will be employed; and b consumption of breakfast by groups of children from low income families vs children from families with averagemiddle incomes, who are 8-10 years of age. The primary outcome will be neuropsychological functioning in specific areas of cognition, as measured by standardized tests. A secondary outcome will be glucose homeostasis, measured by blood ketones and blood glucose and insulin. 