Less Comfortable: Build a bridge out of Keva Planks that crosses a piece of paper.
Comfortable: Build a bridge out of Keva Planks that crosses a piece of paper the long way without touching the paper.
Most Comfortable: Â Build a bridge out of Keva Planks that crosses a piece of paper the long way without touching the paper and that can hold the weight of 5 Keva Planks stacked on top.