What is a fun childish thing you still do as an adult?
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!
I (38 m) still have a blanky I sleep with - mostly because my cat will only sleep in my bed if it's there, she will (mostly) only sit in my lap if it's there and she pretty much just hangs out in whatever room it's in... Yeah... It's her blankly, I'm just its mode of transport to make sure she hangs out with me.