Start by having your students play this game, or this one, or do this activity. They will learn the same thing regardless of which you choose. Then ask some basic questions, such as what is the probability of rolling a number greater than 3 on a standard dice? Here's such a question. After that, show your students the probability of winning the lottery, as seen here. Next, give your students this challenge. After that, give them this one. Finally, show them this video.