Build Your Own Play Place! If kids designed playgrounds, the end result would be delightfully chaotic – and maybe a tad risky. Turns out, that’s a good thing! Adventure playgrounds are dynamic spaces where children can explore, create, imagine and learn in their own way with a variety of materials and loose parts that children are free to use to build, demolish, assemble and change as they desire. Presented by the International Play Association and the City of Calgary. Free.