Yes, Brawl Stars can be regarded as something acceptable for kids, because the graphics are cartoonish, and it plays quite easily. It, however, comes with online multiplayer chat and communication with strangers. In order to make it safe, parental controls in games and their devices, voice/text chat turn off where possible, and time restrictions are to be used to set limits on the time spent in-game. Talk to your child always about respectful online behavior and reporting issues.