Let's-Read-and-Find-Out Science

The Let's-Read-and-Find-Out Science Books series, originally published by Crowell, now HarperCollins, is an American children's book series designed to educate preschoolers and young elementary school students about basic science concepts.

Many Let's Read and Find Out titles have either been reillustrated (sometimes more than once) or reissued under different titles. Some of these titles may be duplicates because of the renaming.

Since the 1990s, the series has been divided into two levels. Stage 1 books "explain simple and easily observable science concepts for preschool- and kindergarten-age children." Subjects covered in Stage 1 titles include the human body, plants, animals and "the world around us."

Stage 2 books "explore more challenging concepts for children in the primary grades and include hands-on activities that children can do themselves." Subjects covered in the Stage 2 titles including the human body, plants, animals, dinosaurs, space, weather and the seasons, our earth and "the world around us."