Energizing the world
If a rollercoaster is stopped and at the beginning of the tracks loading people in to it's carts. This rollercoaster at the time has no kinetic energy, but as soon as the rollercoaster starts on its path through the tracks it gains kinetic energy. At the point when the rollercoaster is at the bottom of its steepest descent it has the most kinetic energy.
Potential energy is energy that is stored when a object is at rest.
Conservation of Energy
When blowing up a stick of dynamite. You convert chemical energy to kinetic energy in the explosion.