Pinnacle Charter School had so many 4th & 5th grade students enrolled in their summer program that we did two back-to-back 90 minute classes! The students learned about the physics of vertical caving (with hands-on at-home experiments as well as demonstrations on our 12′ caving tower).  We also did combustion experiments with carbide lamps to demonstrate numerous chemistry concepts, including exothermic reactions, conservation of mass, and states of matter.  The students also learned about waves and energy, and got to make their own simple phones.