Here are a couple of good ones that we've done at my office.
1)Flip someone's computer screen upside down. It's pretty easy, you just do ctrl+alt+down (arrow). Most people at my office don't know about this, but EVERYBODY has learned to lock their computer when they leave their desk.
2)Switch around letters on a keyboard. This one might require a little more time. You'll need a pocket knife or envelope opener, but it's hilarious to see people's reaction. You can invert O with E, or M with N, or G & H, and most people will not spot it.
3) Put scotch tape over the phone receiver or transmitter.
4) Sprinkle pencil shavings on the phone receiver. Once that person has answered the phone, they'll walk around the office with marks all over their ears none the wiser.
1)Flip someone's computer screen upside down. It's pretty easy, you just do ctrl+alt+down (arrow). Most people at my office don't know about this, but EVERYBODY has learned to lock their computer when they leave their desk.
2)Switch around letters on a keyboard. This one might require a little more time. You'll need a pocket knife or envelope opener, but it's hilarious to see people's reaction. You can invert O with E, or M with N, or G & H, and most people will not spot it.
3) Put scotch tape over the phone receiver or transmitter.
4) Sprinkle pencil shavings on the phone receiver. Once that person has answered the phone, they'll walk around the office with marks all over their ears none the wiser.