When in teeter mode the large flat surface on the foam creates uncompromised stability with the ground while the curved upper edge of allows for the deck to teeter in an up and down motion thereby simulating a schoolyard teeter totter that nearly anyone can stand on. Now don't let this simple design fool you; attempting to stay perfectly balanced over a fixed fulcrum is a gut busting task that requires extensive core awareness, strength and mental focus.

Works great on all our boards with kids as young as 5!