I recently took my 5 kids to the Naval Air Museum in Pensacola Florida (a great museum and free admission).
They have one room that is full of real cockpits for the kids to sit in. I lifted my 4 yr old daughter into one cockpit that had side by side seating for the pilot and co-pilot. When my daughter got in she said "Good - this one's two player!"
DaVinci is best remembered as the painter of the Mona Lisa (1504?)and The Last Supper (1495). But he's almost equally famous for his astonishing multiplicity of talents: he dabbled in architecture, sculpture, engineering, geology, hydraulics and the military arts, all with success, and in his spare time doodled parachutes and flying machines that resembled inventions of the 19th and 20th centuries.