Don't Grow Up

What's the best life advice you can give out? 

I'll go first. 

Don't grow up. I mean you'll grow up, inevitably. But don't kill the kid, who resides in you and wants you to be happy, to just be in the rat race of the community. 

When you want to go out and have ice cream, go and have that ice cream. When your grown up friends call you to play cricket, go and play that cricket match. The kid inside you controls your fun quotient, don't make him/her score a bad fun quotient.