Is it ok for kids. Like 4 to 8 years old

Absolutely!

Yes it's ok. I took my 3yr old recently and she had a great time. Although most games are more for the older kids maybe 7+ to adults, there is still games for the little ones too. Either way they will enjoy it.

There are very few games that might appeal to a 4 year old, I think the adult would have to assist regardless, 6 to 8 could play many games, but yes overall you can take a 4 to 8 year old there amd have fun as there are a variety of games and game types for all ages.