Online animation explains that energy allows various things to work (including humans and machines). *4*Science lesson also provides limited sample questions at the end of the topic.*4**4**1*WHAT IS ENERGY*2*Explains that energy is the ability to work.*4*Explains all living things and machines need energy in order to work and move.*4*Explains all energy originally comes from the sun.*4*Explains energy from the sun is stored in food, which is used to provide living things with energy to work and move.*4*Explains that wind energy turns windmills.*4*Explains the amount of energy from a windmill depends on how hard the wind blows.*4*Explains Power stations produce electricity using fossil fuels.*4**4**4*Useful for teachers of science/physics/chemistry/biology.