This activity is designed to get students to practice Mean Absolute Deviation. I bought fortune cookies online (400 for about $20.00). Students each received a fortune cookie that gave them their fortune and their "lucky numbers". They find the Mean Absolute Deviation of their lucky numbers and then find the MAD of two of their friends' lucky numbers. The students loved it! If you did not want to buy actual fortune cookies you could always have students generate their own lucky numbers. Enjoy!