Mace Windu's purple lightsaber
If you're turning 13 and love Star Wars, it makes sense that you would want a purple lightsaber for your birthday. My son got one--over my initial objection that he already had way too many lightsabers of other colors. Now I know what's behind Mace Windu's purple light saber, and also that this hue of magic weapon may actually have been a personal request from actor Samuel Jackson, when he agreed to play Mace Windu in the films. (I got that from Wikipedia, which quoted an interview on The Late Show with David Letterman.) Yes, of course: who wants to wage galactic battle, and not have your lightsaber clearly identifiable among other Jedi?