Game 1 :

The first game is a basketball where you must throw some trash in the WC or in a bin.
When people throw the garbage in the good place, a game master give them a part of a code to open a lock.
Like this people know what they can throw in the toilet or in the bin.

Game 2 :

The second game is composed of a big box with water and some waste like plastic bottles.
You try to find a key in these waste to open a second lock.
This game show to people how is a polluted water.

Game 3 :

It's a card game where you put some cards with waste picture in the right order. The good order is the time of decomposition of the garbage.
Behind the cards when they are in the good order you can find a code to open the last lock.
With this game people learn how long the waste stay in the water.