#1

Get up really earl y and sneak into your victims bathroom and fill their hair-dryer with baby powder. And when they turn it on, their head will be pure white just like an old person!

#2

Put some water in a cereal bowl, and place it in the freezer so that the water freezes. Offer to make your sister/brother cereal in the morning. Make sure you use that same bowl. Put their favorite cereal over the top of the ice, and serve.

#3

When your victims asleep sneak into their room and draw eyebrows and a moustache on their face, make sure to be their when they look in the mirror. 

#4

Get a small alarm clock and set it for 3:00 a.m. Sneak under the victim's bed. Once it goes off, he/she won't be able to find it will drive them nuts.