Design your own temporary glow-in-the-dark t-shirt designs with the Interactive Lazer Shirt. Just aim the included UV Lazer at the white shirt and start writing or drawing. A temporary glowing line will appear where you aimed the lazer (or any other UV light, in case you happen to carry around other ones at all times like I do). Unlike normal t-shirts, you can change the design over and over again to your liking, plus it glows in the dark. Great for parties, concerts, magic tricks, and mole people.