1st. Use the marker to number all the diapers for as many different kinds of candy bars that you have. Remember to keep track of which candy bar is in which diaper.
2nd. Unwrap the candy bar and place a little piece inside the diaper. Microwave the diaper until it is half way melted. Smush the candy bar a little bit.
3rd. Give everyone paper and pencils and then start passing around the dirty diapers. Each person opens it and smells the melted candy bar to see if they can guess what kind it is. You could probably taste them, but it would be frowned upon by the other guests.
4th. The person with the most correct answers wins!
Can you guess what dirty diaper this is by looking at it?
If you guessed Snickers, you are correct.