Tug-of-war with cheating
Who is the strongest and the brightest? This classical test of strength provided with drums - now, how can you make yourself stronger?
The winner of this tug-of-war is not necessarily the strongest person. It is important to find a drum, which will "help" you with some "extra power", in order for you to be able to pull your opponent in your direction!
Who turns the shaft the most? By chosing a large drum, you will need to pull a lot of string, but that is not so hard. By chosing a smaller drum, you will save the string, but you will need more force!