Is it a good idea to move from the U.S. with children? [View all]

Hi, I've been thinking of this for some time. I'm interested in moving to the UK or some other place else in Europe to gain new experiences. I travel a lot in the US, but I feel like I've already seen it all here by now. Two problems I see are:

1) I have three children ages 1 - 7. I'm not sure if keeping them in the US is wiser to maximize their education and career opportunities later in life
2) I'm an RF engineer working for the aerospace industry. What are opportunities like abroad? I worry that I may lose my security clearance when I come back to the US

I just interested to hear if anyone has thoughts on this or have any personal experiences. I don't want to make a big mistake for my career nor my children's potential future opportunities. More information is better. Thanks!

Edit: also, are there Western European countries to avoid? I heard places like the Netherlands and France aren't receptive to foreigners and could impact my ability to get a job, even though I'm of German and Irish descent.