When I flew to the EU and eastern Europe in 2019, I didn't need a visa. I didn't need to tell anyone my exact dates and itinerary. I paid for a ticket, had a passport, and went.
https://en.m.wikipedia.org/wiki/Electronic_System_for_Travel...
$20, but you have to apply regularly. They do "something" and you may or may not be approved, and everyone including children need their own one.
