Apple says...
The Activity rings experience has been optimized for kids to track Move minutes instead of calories burned and provide customizable goals for the Exercise and Stand rings. Outdoor Walk, Outdoor Run, and Outdoor Cycle workouts have been specifically tuned for kids, giving appropriate credit for Move minutes, exercise, distance, and other metrics, while coaching notifications are tailored to relevant reading levels and made more fun with emoji. Kids can also send and receive Activity Sharing invitations directly on Apple Watch, challenge friends with Activity Competitions, and see a new Awards page so milestones can be celebrated right on their wrist.
They say nothing about awards, which only happen every so often for adults anyway