If Junior wants to impress the judges at the science fair with attention to detail, skill with hand tools, and a generally spectacular project, then this 1985 project is sure to fit the bill. It’s a small electric motor, capable of providing some motive power to other projects.

The diagram shows old-fashioned dry cells, but modern alkaline D cells will work just as well, especially if you get battery holders to keep them in place.

The November 1937 issue of Popular Science shows the complete blueprints for the motor, but without too many verbose instructions. So as long as Junior can read a set a blueprints, the blue ribbon is pretty much assured.

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