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!
Laser tag. Shit's great, the shine does get taken off somewhat when I do really well and rank top but all my opponents are small children and their parents look vaguely annoyed.
I've found that I've been enjoying Archery Tag, also sometimes called Archery Games as a fun replacement for laser tag. It's basically dodgeball but with marshmallow tipped bows and arrows. Shits fun and great exercise.
I did this one about three years ago with my niece for her birthday party and her friends. Just a few of us adults took part as everyone else thought it was too childish.
It felt great to scream and yell in the dark ... I became a squad leader, rounded up my team and got them to scream as loud as possible as we charged the enemy .. I also ran with my niece and ran cover for her .. had a total blast and I was completely exhausted at the end of it all. Nothing like playing games with a bunch of sugar intoxicated ten year olds.
I woke up the next morning and I couldn't stand up ... my thighs were completely crapped from having to crouch, walk and run for two hours the day before.