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Title: They don't Work
Review: The book is interesting & I was really excited about the models & getting a chance to make things work. But, they did not Work! The biggest disapointment was the motor, I connected all the wires & made all the contacts properly & nothing happened. The wheels woobled on the dowels & when I attached the baloon to power the car with air, it turned over instead of moving forward. I tried very hard to make things work, but they did not.
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