Learn how simple machines make work easier in these colorful nonfiction picture books all about science and engineering! What if an elephant sat on your book and refused to move. How could you lift it? Very carefully! You might want to use a pulley. A pulley is one of six simple machines that are designed to make different kinds of work such as lifting, pulling, pushing easier. In Pulleys Pull …
How cool is a supersonic jet that can zip, dip, and zoom through the air? Or a helicopter that hovers as still as a hummingbird? In this 32-page beginning reader, a real-life pilot introduces kids to the greatest planes that ever flew. Enticing photographs and fascinating facts ensure that a child’s natural curiosity is both inspired AND satisfied. Like each book in this successful series, Pl…