Minecraft is a “sandbox” game, in that the player really makes whatever they want out of it. There is some ‘fighting’ that takes place, mostly in the form of defending your buildings from spiders, zombies and other nefarious baddies.
The majority of your time, however, is spent building houses, armor, works of art, etc. For a single player game, it’s very simplistic but that simplicity can lead to many hours of fun. You also have the opportunity to play online with other players which can include some nasty language, depending on which server you connect to.
Buying your child Minecraft is pretty much the digital version of buying your child Leggos. They can build stuff, either solo, or with friends. It’s even fun for adults.