Swing Ball Tennis Tether Game Outdoor Garden SummerDo your kids love playing outdoors? You don't need a huge backyard to provide them with a fun way to get some sunshine and exercise with this swingball set from Randy Travis Machinery. This classic backyard sport has revived in popularity not only for kids but also for adults who want to work off stress or train their racquet technique for their next round of tennis at the club. And, in kids, it helps develop their hand eye coordination for other