Kimberly Brubaker Bradley is the author of Energy Makes Things Happen and Pop!, an Outstanding Science Trade Book for Children, in the Let's-Read-and-Find-Out Science series. She has a degree in chemistry from Smith College and lives with her husband and two children in Bristol, Tennessee. Paul Meisel has illustrated many books for children, including Why Are the Ice Caps Melting?, Energy Makes Things Happen, and What Happens to Our Trash? in the Let's-Read-and-Find-Out Science series. He lives in Newtown, Connecticut.