Learn about how a wheel and axle works! Beginner readers and budding young scientists will love learning about using simple machines in everyday situations. Along the way, readers will be supported by expertly leveled text, a strong text-photo match and appropriate text load. Readers will be excited to dig in and learn all about simple machines and basic physics concepts. The Capstone Interactive edition comes with simultaneous access for every student in your school and includes read aloud audio recorded by professional voice over artists.