With the Ace, kids are finally getting their own cheap Fitbit
 

When Fitbit said it was working on a "family" of devices for this year, it really wasn't kidding. While Mom and Dad might choose to strap on a Versa, Fitbit now has a fitness tracker -- the Fitbit Ace -- meant exclusively for wee ones.

https://www.engadget.com/2018/03/13/...know-for-kids/