Ball Pit Fun!!!! All this past week we worked on drawing up plans, we had decided to use PVC pipe as an exoskeleton and netting for the containment of the balls. We had several sizes that we went through before deciding upon 4ft X 4ft X 2ft for the frame. Here are the plans we used. We decided it would just be easier to have the pipe cut all to the same length, it made for much easier figuring on our part anyways. We figured out that 2300 seemed like a good enough number.