Published by Funk & Wagnalls, Inc., 1981
ISBN 10: 039484842X ISBN 13: 9780394848426
Seller: 369 Bookstore _[~ 369 Pyramid Inc ~]_, Dover, DE, U.S.A.
Hardcover. Condition: Good. Charlie Brown and the Peanuts gang help answers questions about machines and how they work. A great way to share how a a zipper works, what makes springs bouncy, or why grandfather clocks are tall.