Encourage your kids to be more active with the Garmin vívofit jr, Kids Fitness/Activity Tracker! Get one for just $38.99 on Amazon. (regularly $79.99) Choose from the Real Flower band or the Broken Lava bands pictured above. You kids never have to take it off! It even has swim wearability with 5 ATM water resistance. This is ideal for kids ages 4-9 and comes with a compatible parent mobile app that includes fun and educational mobile adventures for kids and chore/behavior management for parents.