Planetary Taxi

"We had a great time zipping around the solar system in our snazzy yellow taxicab. Planetary Taxi starts out with a QuickTime movie that explains the idea of a scale model, and establishes the appealing and familiar metaphor of driving along an actual highway with the sun (an eight-foot tall balloon) as the starting point, past a pumpkin-sized Jupiter, and earth that nestles in your palm, and so on. What's nifty is how successfully it really did orient us within the solar system." -- from Voyager