Why toss a ball for your dog when she can do it herself? The iFetch automated ball launcher can tire out your mutt without wearing out your arm; you can even train your dog to use it when you’re not around. Drop a miniature (1.5-inch) tennis ball into the funnel on top; it will then come firing out the front, traveling up to 30 feet. Repeat endlessly until she’s finally dog tired. The $100 iFetch is really designed for smaller breeds; a model for larger dogs is under development.