Step 1: Supplies needed
Rubber Ball (Found mine at the Dollar store)
Coathanger or wire
Step 2: Easy to make
Cut and bend a coathanger in half, so it can fit through the hole you drilled. Push the coathanger throught the ball. Then fold a piece of the surgical tubing around the coathanger. Make sure that the piece you fold over the coathanger is just smaller than the size of the ball. Pull the coathanger back through the ball, and make sure the surgical tubing stays folded as you pull. Repeat this process with the other end of the surgical tubing. Not it will be harder to pull the second time around.
Once complete it should look like the last picture below.