Backyard Playground Ideas Diy . Cheap diy playground border ideas (for your backyard) wood logs for a raised play area. Composite decking, cantilevered seating nooks, a. Playset & Playground Plans DIY Backyard Blueprints Paul's Playhouses from paulsplayhouses.com Bury this right in the center of the sand/gravel and attach a big plastic ball to the top of the stick with a long rope or long piece of twine. Once the 2×6”s are attached, then screw. Might not do them all but the ideas are there.