Design It! Cranes Guide

$9.95
Stock Number:
651813

Product Overview

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.