Cup Stacking

This is the end of the year. You've cleaned up your class and finished the mess...but you still have a few classes to teach. What to do, what to do

heads!

I know it's nothing new...but man, it works. Divide your class into teams and give them lots of plastic or paper cups...then let them have fun.
Who can build the tallest tower? Who can build a bridge? Who can build castles?

The cup better falls - that's for sure. Kids are crazy!
It's the happiest thing I've seen in my class without color and sound. :)