Voila! Bob’s your uncle! You’ve just made an extremely bouncy bouncy ball! Bounce away to your heart’s content! (I meant the ball, not you, silly!)
If you need more video aid, here is a Youtube tutorial.
Although, if you live in apartment just be aware of your poor neighbours below you because they’ve already had to endure all those jumps of joy when you realized a new craft in Kasia’s Corner was released- they may not appreciate the extra… activity. In fact, they might even come up to complain! Fear not, just show them your creation and they will surely be so captivated that you’ll find yourself bouncing away along with them!