Uncle Norm needs to mail a top secret package, but there’s a problem. The item he’s sendingis not regular, and it won’t fit into an ordinary box. The Rads will have to make their own. They call in a box designer who explains how boxes are made. They learn about vertices, faces and edges and discover the wonder of turning a flat, 2D template into a 3D solid shape.

The Gist: This episode is about common mathematical solids – a family comprised of the cube, prism, pyramid, sphere and cone. Nets are featured as tools for representing shapes in two dimensions.