I agree with most (perhaps all) of what @hop-daddy
said about babies.
The beautiful thing about babies is that they are so pure, without the energy blockages of adults. Some blockages with occur in due time of course, due to genetics, karma (life lessons) and sources.
When we talk about babies and spirits, it good to note that there are benevolent spirits as well as malicious ones. So ideally we want the babies to be surrounded by benevolent spirits, if possible, all the time.
there is no need to worry about the babies adapting as they grow up. Benevolent spirits are highly, highly intelligent, wise and responsible.
Some of the better benefits of having benevolent spirits is that the children grow up calm, composed and confident and they usually magically gain talents and abilities.
For instance when my son was around 5 years old, I felt a cheery, happy presence near him. We went to visit my sister in law and she had a piano. There was a book with musical notes near the piano and my son proceeded to sit down and play a whole song to completion. He played it absolutely beautifully, it was captivating and it was the first time he ever touched a real piano. My wife and her sister were shocked, and we never really got him to play the piano much after that, but it was a pleasant kind of shock, and I hope that he will always make friends with the right spirits. This is only one example and I am sure others have more stories to share.
So I'm saying it wouldn't hurt, in fact I would recommend, to set positive expectations, try see if you can attract the right kinds of friends and helpers for your child.
Still as they grow up, they will acquaint with the bad as well as the good, but it helps to remember that bad isn't actually bad. They are just spirits in need, asking of us, whereas the good are spirits coming to give, so in a way, it's all good. There is a balance of give and take, but just notice that it is not of equal proportion, what is asked for is usually repaid with a much larger gift.