DINOSAURS & THE PREHISTORIC WORLD. Who is on the biggest square? How many circles are there? How many sides does a rectangle have? Toddlers will love learning about shapes with the cutest, friendliest dinosaur family ever! The colorful creatures put on a happy show as they play with everything from triangles to ovals, diamonds, and stars. Each spread features the labeled shape on the left side, and the dinos interacting with it on the right-along with a fun question about each one. Ages 0+.