Potential energy is when an object is in a position where, before it goes into movement, has energy stored inside it that will release when it goes into movement. For example, when you have a ball, and you hold it, say, 1 yd (3 ft) above the ground and keep it there, it has plenty of stored potential energy inside it. But when you release it, all of that potential energy is converted into kinetic energy as it falls. In fact, that leads right into the next paragraph.
The symbol for nuclear energy.
(I Didn't Make Anything About Chemical/Nuclear Energy Because I Don't Know That Much About It. Sorry!)
Ah, energy. Potential energy, kinetic energy, chemical energy, and nuclear energy. Energy is inside us at all times, one way or another. But energy isn't just what lets you run for a longer period. There's alot more to energy than drinking Gatorade and suddenly being able to tackle anyone on the football field.
Kinetic Energy is made when an object is in motion. Kinetic energy is really just potential energy, just converted into kinetic energy (as stated above). While that ball is in motion, it has plenty of kinetic energy, until the ball hits the ground and finally stops moving, which is when the ball has neither potential or kinetic energy.