The preschool level is often the first formal opportunity for children to experience science. There are many examples of appropriate experiments and scientific experiences aimed at young children, both in Mexico and around the world. Even the formal public preschool program in Mexico includes sections called Academic Training Topics, one of which is "Knowledge of the Natural and Social World" that can be addressed through physics. For this standard, the Mexican Secretary of Education has four standards in science: science attitudes, scientific knowledge, abilities associated to science, and applications of scientific knowledge and technology, and teachers are required to address all of them.