Using and old tire and sturdy rope can building a swing sets, you need eye bolts ans s-hooks to hung the rope or china on main pipe and other side on tire. You decide the length of rope by the height of branch and how high you want the swing off the ground, you can make two seat on different height, one for small kids one for old kids, Hang the tire from a sturdy brach that is parallel to the ground, tie the rope on sturdy know for kids to hold on different high. Drill few hole under the tire to release rainwater. You need to try by yourself make sure the frame can hold such weight, support the branch by several support pillar. The branch will not fall even one support is damage. Beside the swing you can set up more support pillar with a platform on it. Building a stair to the platform by wooden, or you can put a whole board from the ground to the platform, on the board nail few pieces of climbing rocking for kids. This kind of platform maximum on height 25ft, it is better create handrail around the platform, so kids will not fall off, put one plastic slide on, swing set with slide make the playground perfect. outdoor playground equipment