When the party is over, start picking up those drink bottles to keep before they get discarded in the bin. Find time to watch this video and decide what you want to do with your own collection of bottles.
There are definitely lots of stuff that you and your children can create so that they can have lots of fun during the weekends, even when they are spending them at home.
You can find the full "how to" instruction posted on Instructables at the following link:
10 Fun Things to do with a 2 Liter Bottle