Day Light, Night Light: Where Light Comes fromPaperback, 1 February 1998

Let's-Read-and-Find-Out Science books help satisfy a young child's curiosity about the world books. Each book in the series introduces basic science concepts and builds on them using a step-by-step method, based on theories about how young children should learn best.

Stage 1 books explain simple and easibly observable science concepts to preschool and kindergarten-age children.

Stage 2 books explore more challenging concepts for children in the primary grades and include hands-on activities that children can do themselves.