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OverviewWhat do jar tops and water-bottle lids have in common? Both of them are screws! Screws are simple machines. They help us to do jobs more easily. But don't take our word for it. Put screws to the test with the fun experiments you'll find in this book. As p Full Product DetailsAuthor: Sally M Walker Feldmann , Roseann Walker FeldmannPublisher: Lerner Digital Imprint: Lerner Digital ISBN: 9780761382096ISBN 10: 0761382097 Pages: 40 Publication Date: 01 July 2011 Audience: Children/juvenile , Children / Juvenile Format: Electronic book text Publisher's Status: Active Availability: Available To Order ![]() We have confirmation that this item is in stock with the supplier. It will be ordered in for you and dispatched immediately. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |