The Portable Lifetime Tetherball System brings another childhood playground game to the convenience and safety of your own backyard. It includes a soft-touch ball and nylon cord, a heavy-duty portable base and a durable weather-resistant construction. The portable tetherball set is safe for children and novices but strong enough to stand up to aggressive play. The outdoor game for kids easily rolls to any space on the lawn or driveway and because it doesn’t require a cement base, it is easy to store and setup. The base can be filled with sand or water to hold it securely in place.