How to juggle with two balls
Start with just one ball. Throw it from one hand to the other, trying to keep your hands as still as possible and looking straight ahead of you.
Then, pick up a second ball and hold one ball in each hand. Throw the first ball. When it reaches its highest point, throw the other ball. Catch the balls, one at a time, in the opposite hand to the one that threw them.
Repeat this exercise but starting with the other hand.