Our soccer practice began this way. On my mark, the kids each opened a trial sized tube of toothpaste. Then, they squeezed it ALL out, until it was completely empty. They thought that was the contest, but then I told them to switch partners.
.
Their partner now took the seat, and wearing latex gloves, they had to put ALL the toothpaste BACK INTO THE TUBES!! It was hilarious! (Amazingly, they actually got SOME of it in, but not all.).
I explained that, like the toothpaste, any words can easily come out of our mouths. Words that help or words that hurt, and everything in between. But once they are spoken, they are out there, and it's not so easy to take back a word we shouldn't have said..
The point is to make sure we are wise, and only say nice things to each other..
Then, we proceeded to run laps and do the rest of the games/drills as one of the soccer parents easily scooped up the mess.