Okay pranks ive pulled while in college.
* Coffee grounds in the shower head
* Talcum powder in the hairdryer
* Overhead cupboard full of bouncy balls
* Superglueing sleeping people's body parts together
* Ducktaping spoons into sleeping peoples hands (especially hilarious when you do both hands so tightly they cant get themselves free).
* Removing all fuses from sockets in every appliance
* Removing the ends of cutain rails so that they fall off when you open them.
And finaly:
The masterpiece
We took every single item (and i mean every single one) out of this girls dorm room and moved it 3 floors up to the roof, placing it on the roof exactly as it was in her room, the desk the chairs, the bed, the carpet and best of all the sleeping girl herself (passed out drunk at the time). The look on her face when she woke was somthing to behold. xD
Edit: you can also have so much fun with a sharpie and some imagination that you wouldnt belive!!