An Interactive Lunar Odyssey
Next time some know-it-all says, "The Moon looks like a crescent because of the Earth's shadow," you can set them straight.
Tell them the moon looks different depending on where it is in orbit around the Earth. After all, only half the Moon is ever lit by the sun. And standing here on Earth, we can't always see the lit half.
To demonstrate your point, move the Moon in the "Phaser" below and watch it go through its paces as you drag it 'round the Earth.
The Phaser requires Shockwave to run.
If it's not working, try downloading the latest version of Shockwave.