You can’t see energy, but you can see its effects. Energy cannot be created, it can only be transferred. Stella demonstrates how the energy in her muscles is used to power a wind-up radio, and how the energy stored in wood is released as heat, light and sound as it burns.
Students could relate the idea of energy transfer to a range of different activities or pieces of equipment. Sports activities including running, jumping and throwing could be considered as could motors, forms of transport or electrical appliances.