Searching the web for information about Politically Correct play for children as a possible assignment topic (I'm interested in finding others views on how play should be made politically UNcorrect - or rather back to grass roots!), i stumbled on this blog called Child Perspective.
It has a post about using a bucket to explain about feelings. - When it's full you are happy, but when bad things happen or you get sad, it slowly (or quickly!) empties. How do we fill it back up?
By taking some of the other people's water?
Or, by FILLING someone else's bucket?! Which obviously would make you feel good for helping someone else!
It was a wonderful concept and really simple - i'm going to try it on the kids!