GIRL 1: Now the next shape is a sphere. Try to make yourself into a sphere – a big ball! The boy tries to make himself into a sphere shape, and an image of a sphere appears. The girl starts to ...

Rectangles, arches, and triangles are the most common shapes used to build big structures. What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable shape.

Interestingly, Princeton University engineers have created innovative 3D structures from a single piece of material by combining the art of paper cutting and folding. They have developed 3D structures ...