Rolling Along explores the benefits and uses of the wheel and axle. RobbO and RobbEE build a cart to make it easier to move a heavy load, and learn how the wheel and axle are also used for lifting and turning.

Rolling Along: The Wheels and Axles 2014, Crabtree Publishing Company

ISBN-13: 9780778704188

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Rolling Along: The Wheels and Axles 2014, Crabtree Publishing Company

ISBN-13: 9780778704249

Trade paperback

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