How to Build a burning blue/violet laser
There's probably a reason that laser pointers are banned from most schools: They're just to fun to put down! Whether you're using them as a pointer, to distract your classmates, or to very wickedly point them in people's eyes, they are toys that are quite addicting.
Make your very own burning laser by checking out this hack video. You'll learn how to create a burning blue/violet laser. You can increase the output by cutting out the plastic on the back of the lens.