Osprey Hydrajet

Our five-year-old tester loved this pack so much, she slept with it at home. That’s because it looks just like the packs her mom and dad carry—right down to the built-in, 1.5-liter hydration bladder. That actually made everyone happier on the trail. “She definitely drank more during hikes, since she didn’t have to stop to open a water bottle,” her mom says. The mesh-covered, ridged foam backpanel provided adequate ventilation on hot days, and the 15-liter capacity (with a plethora of pockets) carried everything from snacks to stuffed animals.