Lock them in their rooms when you play Lego's...It's common practice.
The tree was high
The best sort to fall out of. I'm going to assume your fall was manly, that the thwack oof sound you made when you landed was Titanly and you fucked yourself up good and proper as is expected.
I can report that the fall was more thwatchy as I landed in a pile of branches and oddly slowly as the ladder slid to the side.
The pre requisite pain and being fucked up good and proper happened as is expected. I now wear it like a badge :OD