The document outlines the top 10 harmless geek pranks for April Fools' Day, including tricks such as installing a Blue Screen of Death screensaver and filling an office with packing peanuts. Other pranks involve using text-to-speech messages, remote controlling a coworker's computer, and customizing office printer messages. These lighthearted pranks are easy to implement and can be done in an office setting with appropriate tools and resources.