Exploring the universe and its physical principles with these 40 down-to-earth activities will be a blast for junior space cadets! Using toothpicks, rubber bands, drinking straws and other household items, kids learn how rockets work, how zero-g affects astronauts, what inertia is, and more. From creating constellations to club-soda comets, each project includes a materials list and instructions. Ages 9 to 12. 128 pages, softcover from Jossey-Bass.