This prank needs some preperation but is really worth it. Your coworker will show up and his keyboard will be full of little grasplants!

Food pranks are among the best because they're easy to implement, and they generally get a big reaction, especially when someone gets something they don't expect.

This one is great to fool your kids. When your kids are asleep the night before April Fools day you use food coloring to turn the milk in the carton blue!