Although Fitbit has a lot of solid options to choose from, the Fitbit Ace 3 is going to be the best bet for your child. Offering features such as step counts and sleep monitoring, the Ace 3 also includes animated clock faces, customizable accessories, and a parent and kid view on the app.
And the battery lasts up to 8 days. If you’re looking for a slightly cheaper version, check out the Fitbit Ace 2.