Four people dressed as detectives walk past with magnifying glasses. NARRATOR: This song is all about shapes. Not flat shapes like circles and squares, but solid shapes like cubes and cones.

Flow Free: Shapes is part of an ongoing series, which includes subtitles such as Bridges, Hexes and Warps. And as you might expect, the core conceit of this entry is that you're directing your flows ...

Faces - A face is a flat surface on a 3D shape. For example a cube has 6 faces. Edges - An edge is where two faces meet. For example a cube has 12 edges. Vertices - A vertex is a corner where ...