My daughter has always enjoyed climbing. As a toddler she would scale cabinets, jungle gyms and any other object upon which she could get a foothold. San Francisco playgrounds introduced me to The Crippler. Imagine a 20 ft Christmas tree-like structure, except it’s made of metal chain lattice, in order to allow kids to climb to the top where you’d put the angel. Oh, and it spins. You can spin the tree very quickly, and watch kids tumble off like…