active activities adventure adventure-playground children children’s-playground climbing cubby equipment families fun hut kids leisure light lookout park playground playing rocks safety shade shaded shadows shady shelter suburban sunlight sunshine trees angles down log-steps path paths peaceful perspective public quiet relaxing rocky rocky-mound sheltered stairs steps tranquil view climbing-nets climbing-ropes colors colours ground nets netting open parkland plants posts roped ropes secure textures views boy background barrier bolders boulders carved carvings color colour constructed cover covered crawling dark entrance exit hiding tunnel uneven woodwork boys bridge direction distant evergreens reserve reserve-park stream track tracks