They've waited in the wings, watching you rule the trails as you pulled them behind your bike in the trailer. For years, they've anticipated the moment when they'd be big enough to ride, and that time has finally come. And in the mean time, let the CamelBak Kids' Mini Mule Hydration Backpack help them stay hydrated as they ride paved bike trails or learn the ropes on rolling dirt paths. The 1. 5-liter Crux reservoir makes it easy to stay hydrated, while a small front pocket provides storage for their essentials, like rocks they find along the way or a small tube of sunscreen.