There are many different games that are suitable for children. One of the main things you will need to consider is the age rating of the games. You will also need to check the games before you let your children play.
One game which is suitable for children is Minecraft. It is tailored towards children so is not extremely graphic, but does allow them to fight. It also allows children to be creative and explore.
Another good game for children is Fortnite. This is very popular for children currently as it allows them to play fight in a more child-friendly environment. It is a lot like Call Of Duty but less graphic. You will just need to be careful if they play live as some of the languages is not child friendly from other players.
Finally, Mario Kart. This is an excellent game for children to play. It is lots of fun and allows them to be extremely competitive with family and other racers.