My wife an I bought a house a couple of years ago and had a house-warming party. We go pranked good. Some of my wife's friends from work went to a local office copy/printing store and had them keep a weeks worth of "holes" from the three ring hole puching machine (like hundreds of thousand hole punches). they then proceeded to put them in all of our dresser draws, the pockets of my shirts hanging in the closet, all of the kichen drawers, froozen with water in the ice cube trays, underneither and on top of the sheets on our bed...I am still finding them to this day. they also put powder grape Kool-aid in the shower head so it sprayed out a refreashing hot grape beverage when I took a shower the next day (hung over as heck). Minced garlic on our tooth brushes was a nice touch. Not to mention the TP in the trees and bushes in the front yard. Yes, we got it good. My hat is off to them.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian