People usually view teen years as the "rebellion years". When I was 8, we had a garage sale, near the end a man came up and commented how well behaved we were. My dad responded with a simple thank you. Somehow the man said that they won't be as cute in their teens. Just the world views teens that way, it doesn't mean we have to do act that way.
The teens years are meant for us by God to strengthen are relationships with him. When your young is a good time to develop skills in piano, music, sports and more. When your older it is somtimes harder to devlop thius skills. The same thing is your relationship with God. You need to plant those seeds now and not wait till later.