Vívofit jr. 3 isn’t just a fitness tracker for kids. It’s an interactive experience where your child’s activity unlocks exciting Disney Princess app adventures. This durable fitness tracker is swim friendly, perfect for your kid’s enchanted adventures. No need to stop the fun for charging. This easy-to-replace battery lasts up to 1 year. What fun will your child find? Playtime unlocks Disney Princess adventures, games and icons.