Fitbit Ace 3 Activity-Tracker for Kids 6+ One Size, Black/Racer RedKids spend less time charging and more time moving with up to 8 days of battery (varies with use and other factors) Animated clock faces grow and develop as kids move more throughout the day All day activity tracking shows how healthy habits add up to a healthier life Help kids form healthy sleep habits with sleep tracking, bedtime reminders and silent alarms Bring on the pool party cannonballs or lunchtime spillsFitbit Ace 3 is water resistant to 50