Plastic Wrap [Optional But Recommended]
Scotch Tape [Optional But Recommended]
Plastic Cup [MUST be plastic]
Fan [Preferably a Not-so-Strong one]
A half-hour to an hour.
~~EXPRESS Requirements~~
Plastic Cup [MUST be plastic]
Fan [Not very strong]
15 minutes. And/Or Ice
~~THIS PROJECT ON STEROIDS~~
Put a cup of dry ice in front of a fan.
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Signing UpStep 1Step One: Setting the Cup in the Freezer
Now, find your plastic wrap. Cover the top with it. Optionally, you may cover the entire cup.
Use tape to reinforce the plastic wrap.
Now, place it in the freezer in a place that it is unlikely that it would be knocked over.
~~EXPRESS~~
Fill two plastic cups about three quarters way.
Put ice in them.
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Put a cup of dry ice in front of a fan.
Do not attempt to do the steroid, can and will cause death.
Find your "stock" pictures in Wikipedia or in Wikipedia Commons , but you still need to pay attention to the pictures' licensing and credit them properly if you do so.