Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? A while back, my son and I started talking about building a zip line in the backyard.

Design Squad Nation's Judy and Adam show you how to make a zip line for a Ping-Pong ball. Design Squad Nation hosts Judy and Adam show you how to make a zip line for a Ping-Pong ball in the Zip Line ...