Kinetical Energy is the energy in motion. Potential Energy is stored energy.
Einstein thinks than energy can't be created or destroyed, but can be transformed.
Also, other types of energy are :
Mechanical Energy: is the energy of motion that does the work
chemical Energy: is the energy of chemicals reactions
electrical Energy: is when the energy creates motion
Heat Energy: is the energy that is pushed in motion by heat.
Examples of Kinetical Energy is when I walk. Potencia Energy is like a ball on the floor. Chemical Energy is like the food that I eat is transform in my body into energy.