Design It! Cranes Guide   Stock #: 651813 Price: $9.95 Quantity: Quantity in Basket: none BUY IN BULK! Quantity: 10-99999 Price Each: $8.95 SAVE MONEY! Using a cardboard box as the body, a yardstick as a boom, and a small electric motor as the power source, children make a working model of a crane. One aspect of the challenge is to design different ways of attaching string to the shaft of the motor so that it can lift varying amounts of nails in a cup. Instructional material only. Also see Explore It!

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