Built a treehouse with my 8yo and it's actually standing

So I didn't think this would actually work but my son won't stop talking about it. We spent most of last Saturday hammering 2x8s into the oak tree in our backyard. Used some YouTube tutorials from this channel "Build with Dad" and honestly they made it pretty straightforward. The platform is about 8 feet up and we added a rope ladder my daughter keeps trying to swing from (she's 5, so I'm already worried). Next weekend we're doing the railings. My wife thinks I'm insane but the kids have been outside ALL afternoon instead of asking for screens so... win?