Most Great Pyrenees dogs are very good with kids and they are a calm, affectionate, gentle dog.
That is if the Great Pyrenees dog is treated with love and you take good care of the Great Pyrenees dog.
The dog will then show you and your family love back.
Most dogs are good with people and children as long as you treat them good and do not agitate them or your kids do not agitate them.
If you agitate the dog or your kids agitate the dog then it can lead to any dog becoming aggressive but if you do not harm or agitate the dog or tease the dog then the Great Pyrenees dog will be very good with children.
My neighbor has 2 Great Pyrenees dogs and has young children and the dog is very playful around the kids so if you have young children then a Great Pyrenees will be a good choice of dog to be around children.