SlapApp writes: "Remember playing with a Newton's Cradle growing up? I sure do. I never owned one myself, but whenever I saw one I was instantly drawn to it. There happened to be one in the Principal's office at my elementary school, and since I spent a lot of time there I got many an opportunity to mess with it. There's something fascinating about how energy is passed through each ball and how long they can keep on going without additional help. Well, if you like the original then you're certainly going to love the app! Newton's Balls: Kinetic Physics Newton's Cradle Simulator is a truly realistic version of the real thing."