These are great pranks that will for sure make you laugh but not the victim.
Step 1: The Sink Prank
First, you will need duct tape matching your sink's color, a sink with a sprayer, and glad wrap.
Okay, so make sure everyone in your house is asleep. Next, go to the sprayer and put a small amount of glad wrap on the nozzle of your sprayer. Then, duct-tape the sprayer notch to ON.
THE EFFECTS: A decent alarm-clock and a pissed off sister with plastic on her neck and a completely wet shirt.