We'll vomit up a tonne of glitter & put it in an envelope with your recipients address on the front of it. We'll also include a note telling them how awful they are which will be folded within.
First off, use your imagination. We're going to be pouring a tonne of glitter into an envelope with a folded up piece of paper. You know what's going to happen when that special someone opens the envelope & pulls out the letter? The craft herpes will be released & will go everywhere. By Far the most effective and easiest prank ever.