After all, who wants to stay the same age all their life. It may seem pleasant to think of having a youthful appearance, but what about the immaturity that goes with it? It has always seemed to me that a person is better off accepting how God has made them then by fighting it and trying to be something else. Also, I see each day is a gift and I don't mind looking as if I am well-gifted!
Isn't it funny how we are excited to see children growing up, but at some point we want the growing to stop?! Why can't we be excited to continue growing up even as adults? I don't consider that I will be grown up until I get to heaven. Until then there will always be things to learn and areas where I will be growing up.
So rejoice in your age (whatever it is) and remember that every day is a gift from God and an opportunity to learn more about Him and His goodness and His ways. And best of all, remember that you are still growing up!