This is a comprehensive unit on 4th grade NGSS standards for Energy. It begins by classifying and defining types of kinetic and potential energy. Kinetic energy is further explored in "hands on" activities that allow students to experience properties of light energy through bending light, magnifying light, viewing light through a prism, and polarized light. Exploration of potential energy culminates with an energy transformation lab in which students build circuits. Materials needed for entire unit are available in standard science kits or can be purchased for very little money.This unit will fully prepare your students for NGSS grade 5 standards.