Squares, triangles, and circles. Playtime! When shapes start moving around, there’s no telling what new shapes they can make—or how far they can go.

Did you know that a bunch of triangles together can build a bigger triangle? Or that stacking a lot of little squares makes one giant one? And when circles start bouncing around, all sorts of things can happen—houses and castles spring up, magnificent fruit trees sprout, cars and trains hurry by, and . . . three, two, one . . . there’s even a blastoff to Mars! The book cries out for interaction, such as identical tiles for little hands to place over the three shapes in their primary colors...readers may wish to explore the app of the same name.
—Kirkus Reviews