This is the most important...
YOU WILL NEED:
1 Medium McDonalds Fry Box (only tried it on Australian one's - feel free to tell me if it works on anything else)
2 Hands (Hell, 1 Hand, I managed it holding a camera)
YOU WILL GET:
A small puppet that, if used correctly, will move it's mouth up and down. Cheap, recycling, a reason to eat more fast food: Its the invention of the century!
Step 1: Open the Fry box
Step 2: Opening mechanism
Step 3: Complete it
To use, place fingers on either side at the top, squeeze gently and the mouth should begin to close. If the mouth doesnt close far enough, bend it forward and then try again, if the box breaks when you squeeze it, just make another and squeeze it higher up / not as hard.
Step 4: Destroy the evidence
Hide it in your pocket
Just don't show it to your friends.
Seriously, you may be sitting around the table thinking of something fun to do, but DO NOT attempt this in front of a live audience. They will NOT find it funny, they will shun you, they will ignore you, you will be forced to post lousy instructables from a cold, lonely shed..
Once you are in private, feel free to laugh at your own antics and wish you had real friends.