This simple piece of equipment is a must have for any practical joker. Just stick it on to any normal keyboard and watch your mates panic when they accidentally knock the button and wait in fear for the police to turn up! Or use it as a stress relief when none of the other buttons on your keyboard do anything when those annoying ‘Illegal Operations’ messages appear; just remember that it doesn’t actually do anything!

Of course it’s not only keyboards you can stick it on, phones, desks, people, pets, they all work just as well!