This All Surface Swingball game is like a combination of tetherball and tennis. The great thing about this device is the fact that it can be installed and uninstalled anywhere. This is just one of the many wonderful features that comes with the All Surface Swingball game. Another great feature is the fact that you can use whatever kind of ballast to stabilize this particular device. Kids will enjoy passing the ball back and forth for hours. This makes it a great outdoor device that will give children a lot of opportunity to get exercise. You can also bring this anywhere. Just fill it up with whatever ballast is available. As such, it is great for picnics and trips to the beach. Children will definitely love this.