How old to enter park without adult

[MomOTwins]

Nope, when we traveled 2 years ago they were both well under 18 and looked it. I guess we just look shifty lol.

Now, our oldest (15) depending on how she's dressed could pass for 18 (shhhhh don't tell her that) but not our 12 year old, he's still got the baby face.

So weird, I just double checked the TSA website and Southwest and they still say no ID needed for under 18 children traveling with parents. Who knows.