A game to help understand how difficult it is for third world countries to get access to clean water
A large quantity of water, e.g. A 5ltr bottle you can purchase from the supermarket, or a water carrier
Divide the cubs into 2 teams, you could set obstacles in the way that they have to overcome, or they could just run from one end of the hall to the other.
The aim of the game is for each person in the team to carry the water from one end of the hall to the other as a relay race, to highlight. How difficult it is to carry large amounts of water, and that not everyone in the world can turn on the tap, they may have to walk a long distance to get to clean water.