First up: 6 Mischievous Tricks & Pranks - for April Fools'. Some of these are funny, and some are down right cruel, especially the balance test that leaves the victim standing alone with half filled cups hanging from her teeth and balanced on the tops of her hands.
Next up, from a year ago, 5 Crazy Pranks To Play On April Fools Day! Part 4. Now these are cruel. Don't do them. In fact, don't even watch this video. Watch the next one instead.
This one doesn't offer any suggestions but recounts 10 hoaxes from April Fool's Days past. The best ones: The 1998 Burger King advertisement that the new Left Handed Whooper would feature ingredients that had been rotated 180 degrees for left handed people and the 1996 announcement that Taco Bell bought the Liberty Bell and would rename it Taco Liberty Bell.
Happy April Fools' Day!