Soon it will be the one-hundredth day of school. Minna wants to come up with a really, really different idea for her Ready, Set, 100th project. With the help of Mom, Dad, and Pip, Minna searches the house. She finds and makes all sort of things. She arranges them in sets, and she plays with them. But she's "still thinking!" until, suddenly, she gets a BIG idea! Important math lessons are incorporated into Wallace's signature artwork using origami, recycled paper, markers, crayons, colored pencils and photographs.

After sneaking into a museum, three tiny mice discover that sculptures can be big or little, textured or smooth, and made with different materials. Some stand alone, others are in a group, and still others move. The mice look at the front, the back, and the sides of a slate sculpture by Barbara Hepworth. They see shapes, and shapes within shapes. They think, feel, and then create their own sculptures. Wallace has integrated photographs of real sculptures into her cut-paper artwork to point out the diverse forms that sculptures can take. She reinforces the value of creativity and art literacy in a child’s life. A craft activity and short biography of Barbara Hepworth are included.