Uncle Norm needs to mail a top secret package, but there's a problem. The item he's sending is 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.

Originally released by GAPC Entertainment, Inc., 2011. Streaming video file encoded with permission for digital streaming by Infobase on October 13, 2014.

2D Net --(8:28) -- Art with Math -- (6:04).