1: "Swap out coworker's desktop icons with funny pictures."

2: "Fill office hallway with balloons for surprise distraction."

3: "Set up fake spilled drinks for a harmless scare."

4: "Replace stapler with silly putty for a laugh."

5: "Switch out colleague's chair with a wobbly one."

6: "Cover computer mouse sensor with a small piece of paper."

7: "Dress up office plants with googly eyes for a playful touch."

8: "Leave a fake bug on someone's desk for a harmless fright."

9: "Tape down coworker's phone receiver for a goofy twist."

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