Meet Mia, Ava, Oli, and Seb: they’re the four engaging characters created by Harriet Blackford to introduce very young children to STEM concepts. This simple story, enhanced by Mike Henson’s humorous illustrations and fun-to-do experiments, makes a fascinating subject come alive for preschoolers.

Everyone loves looking at rainbows—but what exactly are they? How are they created? This book takes a first look at the science behind color and light.