Expert mischief maker Henry has sent us a cunning computer trick, one you can play right now if you're using a PC! Clicking the mouse button on your computer is the easiest and most natural thing in the world -- except when it doesn't work. Here's the harmless way to mischievously mess up the mouse:
Press the Start button, and go to Control Panel
Now go to "Mouse" and click "Switch primary and secondary buttons"
This will mix up the left and right buttons, so when your friends or family try to use a program, they end up with an option menu! It's fast, fun, and most important of all, it's really easy to fix.
But remember that the prank will start working right away -- so to even click on the "OK" button and close the window, you'll have to use the wrong mouse button too!