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From dust jacket flap: With a dry cell, two wires, and a doorbell, Rusty makes an important discovery. He learns to make a bell ring. It is so easy he does it himself, and that makes it more exciting. He attaches the wires to the dry cell and the bell and is surprised at the results. Here is the perfect book for answering the young child's questions and for developing his inherent interest in the ... More

From dust jacket flap: With a dry cell, two wires, and a doorbell, Rusty makes an important discovery. He learns to make a bell ring. It is so easy he does it himself, and that makes it more exciting. He attaches the wires to the dry cell and the bell and is surprised at the results. Here is the perfect book for answering the young child's questions and for developing his inherent interest in the physical world around him. The material for the experiments is found in any home or may be purchased inexpensively. All of it can be used with complete saftey.

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