That's great. I started my kid on a DH bike riding with me at age 8. She is ten now and I figure when she hits 16 she'll be kicking some serious boy but. Good for your sister.
so, I started dating this girl and i found out her father used to put her in the downhill race when she was young while he did the xc races. Now, she doesn't know how to bike at all, but used to podium at like 10, so if you can keep her going, that'd be awesome