Im an American military member living in Korea. We like it here a lot and my son (almost 4) and I speak enough Korean to get by. We have Korean go by names and really enjoy exploring Korea; its a wonderfully kid friendly culture. He goes to a Korean pre-school and generally thinks he is Korean

I am about to retire from the military after 20 years in service and have been doing a lot of thinking about where we would like to live. Staying here is Korea is a definite possibility as there are visa programs for US military retirees etc. There are two major concerns however. The first is that we will never "blend" here and blending in is very important in Korea. I don't really mind so much, but my son will ALWAYS be an "outsider" here. It wont matter if he speaks Korean like everyone else, or has lived here nearly all his life. You are either born Korean or you're not. Girls wont be allowed to date him and he will never know if someone is his friend because they want a "pet American Friend" for the status (weird double standard, but that's common here). Status is my other concern. Social stratification in Korea is woven into every inch of the fabric of life. How good was your primary school? What brand of jacket do you wear? Oh, its North Face, well is it top of the line North Face, or just the "cheaper" end of the line?? Yeah, not my thing.
I've lived outside of the States almost half of my adult life and I lived in Finland as an exchange student in High School. Im not particularly interested in living in the US again. I really loved living in Belgium and Finland. I think Europe is a much better fit for my values and preferences.
I don't really have any ties to Belgium that make me want to go back there, but I still have loads of friends in Finland. So after about 6 months of research, I am really thinking Finland is the right choice for us. We have plenty of independent income for the Residency Permit including private health insurance. I don't need to work. I have plenty of savings to get us started comfortably. Id like to spend time at home with my son until he has to go to the newly mandatory 6 yr old pre K. We can spend the year studying Finnish (mine is very rusty) and learning the culture together.
What I cannot really find online is how much there is an anti foreigner sentiment. I blend there. When I was there before, people always assumed I was a Finn. Speaking Finnish helped, but I will never "sound native." People will know I am other. I'm thinking at 4, my son will sound as Finnish as anyone once he has been there a few years. So will we have significant issues with being from somewhere else?
My second question is how kid friendly is Finland? Here in Korea, there are kid cafes all over the place, tons of amusement parks and city parks and zoos. I know we will be able to enjoy our outdoor hobbies like camping and cycling there (when the weather allows!), but I can't seem to find a lot on fun kid activities. Anyone with littles who can tell me if there are plenty of amusements? Muumi Land looks awesome. I figure we can take trips to Lapland to see Santa Village and reindeer races. Do most smaller towns have something like a Y? Indoor swimming pools? I just cant remember.
I am very much attracted to the idea of living in Uusikaupunki where I lived as an exchange student. More of a known entity with people I already know. But I wonder if we might find more to do in Turku....Also, Uusikaupunki doenst seem to have many rentals...
Anyway, thanks in advance for anyone who offers their thoughts.