First pair of little kid shoes, first day of school, first hydration pack the Osprey Moki 1.5L Kid's Biking Hydration Backpack is designed with the same features as the adult packs, but sized for a 4-12 year old. The Moki has a low-profile design and ventilated airmesh harness for a comfortable and steady carry when they ‘re in a riding position. A front shove-it pocket is a handy place to stash gloves when not in use and an external zippered pocket keep small items. Like that necessary snack bar, handy. The included Osprey Hydraulics® LT 1.5L reservoir rides in its own quick-zip access reservoir sleeve and comes complete with the sternum strap magnetic bite valve attachment. It’s the pack you’d buy for yourself, only scaled down for the grom crowd. Start them out young and they’ll be kicking your butt on the single track by the time they’re ten. And since nothing builds independence like mastering a bike there’s a blinker light attachment loop so you can add some extra visibility to them for those days they’re pedaling home at dusk.