LOL!
handy chip dip cups
if popping bubble wrap is therapudic... Imagine what stomping deli cups could do for ya!
2 deli cups, a piece of string... walk around in public with a friend and talk to eachother through them.
Save them and use them to horde all the Thanksgiving Day leftovers you can!
Clap them together Monty Python coconut style and prance around like you're riding on a horsie.
Use them to make fun Jello Jigglers.
Given time I could come up with much more...