free tires from garages more then willing to give them away. A few cans of spray paint from Walmart (paint after assembled to save on paint) and Cypress mulch (packs really nicely) from Home Depot. Adding in a Little Tikes sliding board.
The embankment slide is safer than tower slides with ladders. Scattered boulders, random dirt steps, rough terrain, and varied plantings add to the rich textures and varied experiences on Natural Playgrounds.