How do you convince your perants to let you go to gymnastics?

Well I know it was a pain to get my parents to say yes to gymnastics. But I now have been in gymnastics for almost 2 years. But to get my parents to say yes I had to say things like... "I'll pay for it" or "If i do gymnastics I wont quit." But if that doesn't work then hold off for about a week and then bring up the matter again and see what happens. If their answer is still "NO!" then you can try saying the good points in gymnastics such as "it will improve my flexibility." or "I will make new friends with the same interest as me." But fortunately at this point my parents said yes. but if yours don't you can try doing stuff like chores for them. Or when they ask you to do something DON'T COMPLAIN ABOUT IT!!! I hope this helps.