Learn how to build a PVC Pipe Fort for about $25 that your kids will love. First, use a PVC pipe cutter to cut three 50-inch pipes. Attach 90-degree three-way connectors; use felt pads to protect the floor. Cut two 11-inch pipes and attach them, placing 90-degree elbows on the ends. Cut six more 50-inch pipes and attach them to the connectors so they're all vertical. Attach T-joints to the tops of the pipes, then attach more PVC pipes to create the top of the fort.