Ask for help with a project. Then fill a cup with water not all the way though. Then have them hold the bottom of the cup with the end of a broomstick. Then leave them with no way to get the cup down making the cup fall and water spill everywhere. :) funniest thing ever
Some April fool's day jokes and texts include: say that you are pregnant, gay, someone so dear has been arrested or you have been arrested. You can also tell your friends that you have something big and that they should meet you at school in a hours time. This is so that you can give them the full details.