Benjamin Franklin portrait

Credit - Edgar Fahs Collection, University of Pennsylvania Library

Sketch of George Cayley's 1904 glider

Credit - Wright State University

Replica of the Wright's 1899 kite

Credit - Wright State University

Diagram of Wright's 1899 kite

Credit - Wright State University

Toys used in space

Credit - NASA

Model of Mars Sojourner

Credit - NASA

Nerf(R) glider

Credit - NASA

Shuttle model made of Legos(R)

Credit - NASA

Darth Vader's TIE Fighter

Credit - (c) 1997 Lucasfilm Ltd. & TM. All Rights Reserved. Courtesy of the National Air and Space Museum. Smithsonian Institution