This chapter will cover the basics of how UIKit Dynamics manages your application's behaviors. We will cover specific behaviors, such as gravity, bounce, and other physics properties. Additionally, we will learn how to create physical boundaries so that our views have something to collide with. Without these boundaries, our views would continue moving forever without stopping. We will cover how our views will interact with one another, including collision detection/notifications and attaching views to one another. Lastly, we will talk about motion effects and about creating a parallax effect similar to iOS 7's home screen that moves when tilting your device. We have a lot to cover, so let's get started!