For this puzzle/game, you will need to find a group of friends, preferably 5 or more. The premise is that you will go together on a vacation but each of you can bring only specific items there. The rules regarding which items can be brought and which not are known by one of the players and the other ones are trying to guess them.
In the exchange below, George is the one organizing the trip and the one who knows which items the rest are allowed to bring.
GEORGE: I will take my guitar with me. What do you want to take?
SAM: Can I take an umbrella with me?
GEORGE: No, you cannot take an umbrella, but you can take some sunscreen.
HELLEN: Can I take a scarf with me?
GEORGE: No, you cannot take a scarf, but you can take a hat.
MONICA: Can I take a dress with me?
GEORGE: No, you cannot take a dress, but you can take some makeup.
Can you guess what the rules of the game are?
Everyone is allowed to take with themselves only items whose first letter is the same as the first letter of their names. Thus, George can take a Guitar, Sam can take Sunscreen, Hellen can take a Hat, and Monica can take Makeup.