Nair - This will more then likely start a war or get your ass handed to you but, open a shampoo bottle of your siblings or parents and empty it at least half way.. then add Nair Hair removal in it.. (Note: do not be in your house after you do this)

WANT water? - Ok this was done when i was hanging out with a friend. What we did was just get a class of water and go into your victoms room when their sleep.. simply just throw the water on there face. make the water cold.. not hot.. or there might be serious problems.

Smoke? - Go buy some smoke fireworks or make them yourselves you can find out how to on youtube or google. Anyway next time your at home or a party simply go to the bathroom or upstairs.. and set a couple off and go back doing something not suspicious. People will freak and run outside.

Alarm set - This is a classic prank that i have done to my parents awhile ago. Set their alarm and all alarm in your house two hours ahead of time. Theyll be at work really early and be so confused. (note: cell phones to)

Computer scare - Tell your family or friends or whomever to visit the sites below.. (note: Turn your volume really high) Sites: http://www.rumdesign.com/wrong/
http://www.fugly.com/media/view.php?cat=DOWNLOADS&id=709

Kitchen Sprayer - Grab one or a couple ruber bands and go to your kitchen and loop the bands around the sprayer making the handle squeeze down.. So when the next person turns the sink on the sprayer will hit them. (Note: make sure the sprayer is targeting where you stand and not off the the side, also color the bands the color of the sprayer so it blends in)

Alarm set 2 - Ok go into the persons room and set there alarm really earky in the morning. Next hide the alarm clock somewhere where they cant find it.. somewhere inside their room. And unscrew their lightbulb. Theyll wake up looking for the clock in total darkness.

Toothbrush - Grab something nasty such as sour or salt. Next pour it on your victims toothbrush. When they brush there teeth theyll get a nice flavor.

Shower Head - If you know a friend of a family member that turns on the water before entering the shower turn the shower head pointing towards them. when they turn on the shower theyll be pissed.

Soap bar - Ok go get the soap bar from the bathroom and coat it in nail polish and place it back when it is dry. This will make it so it does not lather up and they will run themselves hard.

Shampoo Bottle - Glue all the shampoo tops down so you cannot open them.