Sixth graders identify how to use pulleys to change the direction of force. Students develop ways to evaluate designs, noting that no one best design exists and that different tasks require different designs. Students designs will vary.

Design and construct a structure out of spaghetti and marshmallows. Although spaghetti doesn't seem like a strong building material, you can build surprisingly elegant and sturdy structures using it.

Become an engineer, and design a submarine that moves in the water like a real submarine. Try making it sink, float, and hover in the water.

The National Academy of Engineering promotes engineering as a career, especially to women and girls. Answer questions you have about becoming an engineer and about being an engineer.

Dedicated to educating the world about engineering, and promoting engineering concepts and projects, Engineering UK inspires people at all levels to pursue careers in engineering.

A portrait of Robert Fulton from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

A portrait of Guglielmo Marconi from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

A portrait of Samuel Finley Breese Morse from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.