You want to pedal downtown to the farmers market with your kids in tow, but you're not sure what to do with them once you arrive. Instead of strapping a stroller to the top of your trailer, get Burley's Stroller Kit, which lets you convert your trailer into a stroller and vice versa. Attach the stroller kit's wheel to your trailer's hitch; once attached, this wheel flips up out of the way when you want to bike and flips down when you want to stroll with your Burley trailer. You don't need to lug tools with you, either. Burley threw in a wrist tether for added safety when you walk or jog.