Creating different bouncing balls

I was able to create 3 different balls but cloning them.

I then opened up the "dope sheet" which showed me what was happening in the animation and when. I then could move the "world" line to move the whole scenes animations to start at a different point.

To make the balls bounce at different times I could move the line of each individual ball or lengthen or shorten it. This gave a more interesting and life-like bouncing effect.