Carol Ballard is a full-time author after spending the last 15 years as a science teacher. She now writes and consults on a wide range of scientific topics.
Introduces you to the inner workings of the human body. This book includes: colorful, detailed illustrations and photogr... MoreInside My Body: Pack A of 5
Discover where sound comes from, how it travels and how we hear sound. Learn about echoes and how sound is measured. ... MoreHow Does Science Work?: Sound