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

How much would you weigh on Mars? What can exploding balloons tell us about weather? Why do heavy ships stay afloat on water? How can you lift an elephant with

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

Over Two Million Janice VanCleave Books Sold! Janice VanCleave's Science Around the Year Dozens of Seasonal Projects Loads of Fun Facts Why do leaves change col

There's plenty for you to choose from in this collection of forty terrific science project ideas from real kids, chosen by well-known children's science writer