Cup Stacking

It's the end of the year. You've already cleaned up your classroom and you are done making messes.....buttttt you still have a few classes to teach. What to do - what to do?

CUP STACKING!

I know this isn't a new thing.. but man is it effective. Break your class up into a couple teams and give them a ton of plastic or paper cups.. then let them go wild.
Who can build the biggest tower? Who can build a bridge? Who can build a castle?

The best part is when the cups come tumbling down - which will inevitably happen. The kids go crazy!
It's the happiest I've ever seen them in my classroom without paint or clay everywhere. :)