To make the crumbs, you can put two or three graham crackers into a plastic bag and let the children take turns crushing them with a rolling pin. You may need to repeat this several times until you have a full cup of graham cracker crumbs. Refrigerating these graham cracker treats for about a half hour will make them firm.
Children learn so much when they are involved with making food.
They learn about math when they measure and count. They experience scientific principles when they see how foods change at different temperatures or when they're mixed.