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Step 3Prepare the tube
Seal up one end of the tube using a piece of cardboard and tape. Use hot-glue if you like.
Cut it down so that when you put the ball in, a segment of it pops from the top. I.e, somewhere between the radius and the diameter of the ball. The longer the tube, the more restricted your range of movement will be. On the other hand, if it's too short you'll probably loose stability. I think in the end it's best to aim for 2/3 the diameter of the ball.
Cut it down so that when you put the ball in, a segment of it pops from the top. I.e, somewhere between the radius and the diameter of the ball. The longer the tube, the more restricted your range of movement will be. On the other hand, if it's too short you'll probably loose stability. I think in the end it's best to aim for 2/3 the diameter of the ball.
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