By eHow Hobbies, Games & Toys Editor
Rate: (0 Ratings)
If you've got a sneaky sense of humor, you can have some fun at a friend's expense. Just make a simple projectile launcher small enough to conceal in your pocket. Watch your friend look around in confusion while you casually act innocent. He won't know what is causing commotion around him, where it came from or who's responsible.
eHow Hobbies, Games & Toys Editor