Tennis is one of the few games you can play for a lifetime. It also requires a partner. Slinger's Slingshot T-One lets players home their craft on their own. The launcher's wheeled bag is easy to pack to and from the court, with an area up top that holds over 140 balls and another at the bottom for adjusting the speed, frequency, and height. There's also room in the bag for a couple of rackets, a pocket for a phone — complete with a charging cable — and an optional phone mount for recording practice sessions. It lasts for up to 3.5 hours per charge and has a remote control for turning it on/off from across the net.