Hi Katrina! My tween daughter loves a good Disney makeover, but just like your daughter, she thinks she's outgrown the princess bun. While the Bibbidi Bobbidi Boutique does offer two additional hairstyles that are a little more funky for the older girls, appointments at the Boutique are only available for those ages 3 to 12. If your daughter wants a cute ponytail hairstyle, I recommend you make a reservation at the
Harmony Barber Shop in the Magic Kingdom, where she can get a casual up-do adorned with colored gel and pixie dust. Another fun option is
The Pirates League, where guests of all ages can be transformed into pirates. The experience is a lot of fun, and my daughter really loves the Empress makeover there, which includes make-up and nail polish.
I see that my fellow
Moms Panelist Wilma checked into the availability of the Bibbidi Bobbidi Boutique sashes for you. While I personally haven't noticed the sashes for sale outside the Boutique, many of the accessories used at the Boutique, such as the tiaras and the rhinestone clips, are offered, so it's possible that you could find a princess sash available as well.
Wishing your daughter a magical makeover! Come visit us again at the Moms Panel if you have more questions! We'd love to help!