How is your forearm like a lever? * What makes it easy to pull a flag up a flagpole? * How can a windmill help to do work? Janice VanCleave's Machines includes

The perfect science fair idea books . Spectacular Science ProjectsJanice Vancleave's Electricity * How do you make a battery out of a lemon? * Can a magnet prod

How do plants make their own food? Why do the different strings on a guitar have differentsounds? What does the color of a star tell you about how hot the stari

Profiles of some of history's greatest scientists-- and fun experiments that demonstrate their theories! Janice VanCleave's Scientists Through the Ages profiles

The author's hands-on science books for kids ages 8 through 12 have set a new standard in science activity books. Children, parents, and teachers have come to l