Some energy is ready to be used.  A change can take place that makes the energy be able to be used.  We eat food.  The food has chemical energy.  Our bodies can change the chemical energy in the food we eat into energy we can use to move, jump, and play!  Wood has chemical energy.  When it is burned, it releases the energy as heat.

Things can have energy.  The Sun has energy.  It helps things grow.  When we move we use energy.  Energy helps us to work and move.  Food gives us energy.

We can hold energy in things.  This keeps the energy to be used for later.  A battery stores energy.  Our bodies store energy.  To store means to hold something to be used later.