In the traditional version of the game, one person says "I packed my bag and in it I put...", and names any object.
The next person then says "I packed my bag and in it I put...", followed by the original suggestion, and adding their own.
[1] A game that started as "I packed my bag and in it I put a toothbrush" may, after six further turns, be something like: "I packed my bag and in it I put a toothbrush, a volleyball, a comic book, a banana, a deck of cards, a baseball cap, and a tent.
"[2] A common variation of the game is that the items listed must be in alphabetical order, so the first person would need to choose an object beginning with A, the second person's object would begin with B, and so on.
[3] Alternatively, objects can be named in any alphabetical order, but without repeating an earlier starting letter.