A good prank to pull on your co-workers, teachers, relatives, and for all ages, too!
It only takes about 30 seconds.
Post-it or any tape that's opaque
The victim's mouse (computer laser mouse)
WARNING: DO NOT DO THIS PRANK IF YOU GET PAPERCUTS TOO EASILY. Well, maybe not, but, be careful, although it doesn't require much effort.
Step 1: Writing on the Post-it/Tape
Step 2: Sticking Post-it on Mouse
If the Post-it is too big, trim it so it isn't visible when the mouse is flipped over.