Two kids play with a hose under a rainbow.

What is a Rainbow?

by Harriet Blackford Author and Mike Henson Illustrator

The characters in this book—the TechTots—learn about what rainbows are and how they are made, bringing the reader along for a ride with them. There are fun, simple experiments to do along with the TechTots as you read, and by the end you've learned all about rainbows. It is aimed at young children.