Economics is such a difficult concept to teach. Charity is, too. Neither one has to be. Put children at work selling what they know. Whether it's providing a service, or making a bracelet, an origami or an airplane, students become validated when their talents and treasures are coveted by others. An extension to this, however, is using their talents to help others. So if there is a natural disaster, or a need of some sort, or a charity which can benefit, have students put economics to use, as they engage in service learning.