I think you should think more about what it means to grow up, because in my opinion it is based on ridicolous stereotypes about children and adults.

Growth has nothing to do with the kind of people one is.
Many children are bossy, bullying, uncreative, closed minded, unplayful, unfunny.
So if you are the opposite, there’s no reason for growth to change you.
Who ever said that a person of whatever age can’t strive to cultivating creativity, playfulness, fluidity, sensitivity, immagination? Who ever said that striving to maintain those characteristics is about “never growing” when most children themselves don’t possess those characteristics? Who ever said that being overly serious, closed minded and stern has anything to do with growing?

There’s no physiological or biochemical mechanism by which age should change someone personality. In fact it doesn’t. Children don’t share a common personality due to their physiology, it’s an unscientific myth. That’s why children are all different and why two children, age aside, might have nothing in common with each other.

People like us who wants to remain the way THEY were as children (want to be true to their original and unique personality), should destroy the age dichotomy and stereotypes instead of reinforcing them. We should promote age bending, showing the truth of how no personality can be linked to whatever age. Showing that personality traits stereotypically associated to adults are easily seen in children and personality traits stereotipically associated with children are easily seen in adults. Personality are individual things and a number on your birth certificate can do nothing about it. Age is irrelevant. Growing up is a myth.

- What does adulthood mean?
It means that a social group,
well organized and also possessing a number
of usually solid structures, takes control of the
life of the person who has reached “adulthood”
and subordinates and integrates him firmly into itself.
From that moment adults are firmly integrated into
these groups and we see them turn into very important
people, decorated, beribboned and frequently childish.
So adulthoos id a myth, because it infantilizes people
in the very process of integrating them with terrible
force into a social structure.
This is one of the great myths of our everyday life
and adults and childre are both victims.
I believe it is one of society’s most opressive myth,
and that’s why I’m on the side of everyone, young or
not-so-young, who does not believe in adulthood -

(Henri Lefebvre – sociologist)