There are several theories on how April Fools Day came to be, some date as far back as 1564. Regardless of when it started there are some people who really get creative with the day, so stay on edge until the day is over. In fact over the last couple of days web hits for April Fools Day pranks were very high. If you are looking for some last minute prank ideas, check out these options...
http://buzz.yahoo.com/buzzlog/93527?fp=1