BE AMAZING TOYS-Energy Stick. The Energy Stick is a great toy to explore the science of electricity and circuits. Electricity is defined as the flow of electrons through a circuit. The Energy Stick's sensing circuit is so sensitive that it can detect even the tiniest flow of electrons through the moisture on your skin. This package contains one 7-3/4 inch tall stick. For ages 4 and up. WARNING: Choking Hazard-small parts. Not for children under 3 years. Imported.