It might be possible that babies have faith.
Mat 18:6 But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.
Now, I don't know how old these children were, but I get the impression they were very young, perhaps less than 6 or 7 years old, but Jesus said they believed in him. Perhaps all children have a form of faith.
But it is clear God does not hold little children who have no knowledge of good and evil accountable until they mature.
In fact, it was the knowledge of good and evil that made Adam and Eve accountable and this is why they spiritually died after they had sinned.