Do you know that there is very very very very strong research showing that children that are kept too clean are more likely to develop MS later in life?
The kids never get exposed to anything and therefore never develop the covering for their nerve endings or something like that. They miss a vital step in their cellular development.
I know 2 people who have MS and both of them were not allowed to go out and play in the dirt, or even do normal kids play on a playground.
One had a governess and a nanny that kept them in dressed up clothing and they only came down from the children's quarters when someone famous was dining with their parents. She and her brothers did a good evening sort of thing like the family in Sound of Music. Children were seen and not heard otherwise. Her family was quite wealthy and had guests like Clark Gable and other big stars of the day. She does not ever remember going outside to swing or play on a regular play ground.
The other lady had much older parents and they didn't have any play equipment in their yard. The children only got to do indoors activities and didn't go to public school until 6th grade. Her sister that is about 8 years younger than her has no symptoms but she was quite the tomboy and once they started public school would come home each day filthy from playing outside.
So if you google the research you will find that a normal childhood includes normal contact, normal activity, normal roll in the mud kind of stuff when it's appropriate.