>>Wouldn’t you have to have a pilot’s license to operate one of those things?
Aircraft under the FAA’s 14 CFR Part 103 ultralight category does not require a pilot’s license to fly. There are helicopters, fixed-wing planes, and gliders that fall under this category.
I finally got around to taking FAA 107 cert test, easy and enough for now.
I got my SEL pilot's license in the '70s. Had a 4 place fixed wing plane for a couple of years and then I got married. Sold it and started to build a Benson gyrocopter (would be under 14 CFR Part 103 I think). I got it done up to the point of adding the engine. Then I took a serious look at it and sold it. Never heard any more about it.