Science Museum, London
Science Museum Online Stuff: The First Flight
An excellent article about how Orville and Wilbur Wright's interest in flight developed and led to the first airplane flight.
Other
Open University: First Flight: The Wright Brothers
A look at what the Wright Brothers accomplished. Includes information on the scientific experiments that they conducted, and the 1903 flyer they built to protect themselves from injury as they both learned how to fly.
Ibis Communications
Eye Witness to History: The Wright Brothers First Flight 1903
Orville Wright's account of his and his brother's first three airplane trial flights.
Smithsonian Institution
National Postal Museum: Art of the Stamp: Kitty Hawk (1903)
View the artwork for a U.S. postage stamp issued in 1998 to commemorate the Wright Brothers first flight near Kitty Hawk, North Carolina. Includes a detailed paragraph about the famous flight.