My son is 9 years old and is the size of an 11 year old and it fits great with loads of room. He loves it and loves the compete with us on challenges. Definitely a great buy, we got it the day it released and he's even got in the bath three times with it on and forgot and it still works great!

Built with the intention of making sure your young ones are as active as possible, the Fitbit Ace 2 improves on the previous model with a more eye-catching design, better screen and improved water resistance. To top it all off, it's slightly cheaper than the original, too.

Colorful design; Changeable straps; Swim-proof

Feels a bit cheap; Still somewhat expensive for what it is; App can be fiddly to set up

The Fitbit Ace 2 is designed especially for younger children. It's a well-priced if basic activity tracker. It lacks the more advanced health measurements you'll find on the pricier Fitbits but it has enough to motivate a family to up their exercise.

Ultimately the Fitbit Ace 2 is a good evolution of the Ace. The new design protects it a little more, waterproofing is an important addition, it's more customisable and easier for younger children to put on and off - but that important sensor module could do with being a little more secure.

Bigger display does more; Adds timer and stopwatch; Waterproofing; Strap easier to undo; Parents stay in control

Battery life should be longer; Not securely fixed into strap

A welcome refresh that's more appealing to children. We think the module should be more substantially held within the strap, but the addition of a more engaging display and waterproofing makes this a better device than the previous version.

Bigger display does more; Adds timer and stopwatch; Waterproofing; Strap easier to undo; Parents stay in control;

Battery life should be longer; Not securely fixed into strap;

Fitbit Ace 2 for Kids Review – Hello! My name is Isabel Good. I'm a kid, and I was asked by Craving Tech to use the Fitbit Ace 2 and let you all know what I think about it. So here are my opinions about it. I will tell you all of the functions, flaws and all.

The Fit Ace 2 is an improvement over the original in every way. Its new design is vibrant and fun, not to mention more durable. The addition of a touch screen also makes for a smoother user experience.

Affordable; Vibrant, kid-friendly design; Interchangeable straps; Fairly accurate fitness tracking; Long battery life

No heart rate monitor

The Ace 2 is the follow-up to Fitbit's first kids' fitness tracker, the Ace. It's designed for a wider range of children (ages six and up as opposed to eight), at a lower price that parents will appreciate ($69.95; $30 less than before). Although it tracks the same metrics as its predecessor—step count, active minutes, hourly movement, and sleep—it's more durable, easier to use, and has a more versatile design. It's a healthy and motivational way to make sure your kids are staying active. It earns our Editors' Choice as the best childrens' fitness tracker you can buy. The Inspire In Disguise To create the Ace 2, Fitbit has essentially taken the Inspire and tucked it into a new wristband. The beauty here is that when kids outgrow it, they can swap it out with Inspire accessories rather than purchase a completely new wearable. Similar Products Fitbit Charge 3 $149.95 See It at Fitbit Read Fitbit Charge 3 Review Fitbit Inspire HR...

Adults aren't the only ones who need to move more to stay healthy. The Fitbit Ace 2 features a number of improvements over its predecessor, making it the best children's fitness tracker you can buy.

Affordable; Vibrant, kid-friendly design; Interchangeable straps; Fairly accurate fitness tracking; Long battery life

No heart rate monitor

The Fitbit Ace 2 is a kid-friendly fitness tracker with fun animations to keep them hooked.

Colorful; kid-friendly; and replaceable bands; Animated watch faces; Swim-proof; Motivating goals; badges and trophies

Tracker is prone to falling out of the band; Annoying to switch between child and parent view in Fitbit app; Display prone to scratching

Fitbit released the original Ace as a fitness tracker for kids last year in a bid to tap into the older child market, and with childhood obesity growing every year it is something that should be a growing market.