Six waterproof foam pieces build a first climbing course for children just past one year old: a climbing triangle studded with easy-grip rocks, a ramp, two half cylinders to rock on, and two cuboids that raise the layout. Hook-and-loop fasteners hold each connection so a piece will not slide out from under a foot mid-climb. The PU leather shell wipes down after a spill and the smooth zippers stay tucked into careful stitching. At 7 lbs the set gives a toddler indoor climbing practice with the least bulk, and the pieces stack flat against a wall when the room is needed.