I totally agree that nudity is really natural for kids. I discovered naturism at 6 when I was no longer a baby, but still very young. And as far as I can remember, it felt natural. Having seen my parents and siblings naked, I was never uncomfortable in front of others when we started to practice.
It's also related to the way parents educate their kids. At home, our parents made sure nudity was a normal thing. For instance, my mom undressed me after school and I could play naked before taking a bath. Same thing after the bath. We were not continuously practicing in the winter, but the bathroom was the communal naturist place
 
  

Yes it sounds very much like our home. Our children just take nudity as a natural part of life. It certainly makes life easier. No worrying about whose in the bathroom, whether doors are bolted or getting dressed in a hurry. 

Having always known Steve and I to be casual naked around the house the boys seem totally oblivious to whether we are dressed or not, they just act and treat us the same no matter what. Our oldest son is 12 next month and he seems to have a little concern that friends at school may see him naked on a beach. School politics can be tough in that way, hopefully it won't be enough of a concern to discourage his natural want to enjoy sun, sea and sand in the sensible state of naturism.

The fact that your son is still naturist with you at the age of 12 is a very good sign. Social pressure increases for teens, and there is indeed a question about their friends. What if they learn about it? Will they make fun of me? Will they still be my friends? 
Here is how this was approached in my family. They always made sure we met other naturist kids of our age during the vacations (kids club, etc.). Same where we lived (thanks to clubs or the federation). So we had a few naturists friends of our age. At school, this is not something we were telling at first, but our best friends ended up knowning about it. I remember there were a few laughs but not from my closest friends. It was actually a good way to understand who is really your friend or not, as my parents always said. The reality I think is that most people don't really care, unless you live in a very conservative environment. 
More interestingly, there was a couple of occasions where friends and friends of my parents discovered naturism because of us. Relatively rare, though 

Very good advice and it is something that we are very aware of and hope can happen but we will have to see. They have always seen other naturist children in Spain but so far in England we have had no opportunities to socialise with anyone let alone other children. But that is exactly what they need and something that was lacking during isolation last year.

Most of their school friends knew they were naturists in Spain and they couldn't have cared less, now in England with a new set of friends to make the emphasis is on fitting in. New residents in England, new at school, with slight Spanish accents and vegetarians they already stand out - add naturism to the mix and they may feel that that is a making them stand out a little too much. We will have to see, but we do agree an opportunity for a naturist camping trip with other naturist families would be a brilliant help. They need some naturist pals.  

[blockquote class='siteforum_icon_quote']Anna ANW said:  They need some naturist pals.  [/blockquote]

Don't we all? lol