Bent ply cable climber. If you're four feet tall, or less, in first grade and lucky enough to be close to one of these huge climbers, you will truly enjoy a Luckey Climber. Found mostly in children's museums, the climbers feature a vertical and horizontal maze of paths made of "wavy plywood", steel, cable and what looks like netting. Must be seen to be fully appreciated.

+ luckeyclimbers.com