All moving things in the world have kinetic energy. It is energy in an object due to its motion.
Very large things, like trucks, and very small things, like marbles, have energy. The heavier the object and the faster the object moves, the more kinetic energy it has.
Kinetic Energy is energy that is in motion. Moving water and wind are good examples of kinetic energy. Electricity is also kinetic energy. Energy is measured in the amount of "work" it does.
Potential Energy is stored energy. Examples of potential energy are soda inside a can, and water in a pond.