What is a fun childish thing you still do as an adult?

https://midwest.social/post/1029310

What is a fun childish thing you still do as an adult? - midwest.social

For me, it’s sticking my hand out of the window of a moving car. Whether I’m driving or not, I love having the windows down and waving my hand in the wind. I’ve loved it since I was a child and I’ll never stop doing it!

Breaking hard-boiled eggs on my forehead when having visitors. I’m 40 something.
I like to knock on hard-boiled eggs to break them. Seems more polite.
I don’t knock for noone.