Pressing Down: The Lever
From the Series The Robotx Get Help from Simple Machines
Pressing Down explores the benefits and uses of the lever. RobbO and RobbEE learn how a lever can be formed in three different ways to do different kinds of work - lift and lower, separate, and open.
Format | Your Price | Add |
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978-0-7787-0416-4
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$22.95 | |
978-0-7787-0422-5
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$8.95 | |
978-1-4271-7528-1
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$29.00 |