After Triangle plays a trick on Square, Square plans to reciprocate but runs into trouble when he tries to enter the triangular doorway of Triangle's home.

The chameleon is feeling blue because he's lonely, so he goes and visits a yellow banana, pink cockatoo, swirly snail, brown boot, and so on. Each time, not only does he change his color to match the object or animal, but he also contorts himself into a shape that matches them.

Three mice make a variety of things out of different shapes as they hide from a scary cat.

Illustrations and short verses introduce shapes associated with each month of the year, such as circles that make up a January snowman, and triangular treats enjoyed in November.

"In this lesson you will learn to cover the area of a shape by using square units."--

"Beyond circles and squares is a world full of other shapes-- from Arches to Zigzags and everything in between! Learn letters and shapes together with this collection of 26 unique and amazing shapes, from deltoids and fleur-de-lis to nonagons and pyramids."--Page 4 of cover.