In this Cyberchase video, Bianca and her friend go camping and soon realize that Bianca has left the food at home. They find a vending machine in the woods, but it doesn't dispense the food that corresponds with the numbers Bianca presses. After several attempts to get her favorite candy bar, Bianca discovers a pattern, or rule. Each time she enters a number, she gets a snack labeled with the number she pressed plus two (n + 2). In the accompanying classroom activity, students play a dice game in pairs in which one student applies a rule in secret that the other student must guess. Points are awarded for correct guesses, and students are penalized for incorrect guesses. This resource is part of the Math at the Core: Middle School Collection.