Does elder daughter like her own hair style? Shaving her head might be too far, but perhaps everytime she cuts her sister's hair you could cut hers. Make it really ugly. OR cut the hair on her favorite Barbie or doll. Or cut up her favorite clothes/things. Do something drastic and keep doing it everytime she cuts her sister's hair. She is now being defiant. She understands that she is not to cut her sister's hair. It doesn't really matter WHY she is doing it at this point.
I also like the "you can't be trusted so you have to stay with mommy" idea. Make sure she is with you for lots of really boring stuff. I might go as far as to not allow any distractions. She has to just be with you and sit. If she can't be trusted with scissors, clearly she can't be trusted with anything.
Option C is to take away her favorite things. Mommy and Daddy have said do not do this. If you do this we will take away X and put it away until you are big enough to behave yourself. If the woobie goes into storage for a while perhaps it will help her remember.
Good luck. The stubborn ones are the hardest to raise, but they usually turn into the best adults. We just call it persistance in adults.
I also like the "you can't be trusted so you have to stay with mommy" idea. Make sure she is with you for lots of really boring stuff. I might go as far as to not allow any distractions. She has to just be with you and sit. If she can't be trusted with scissors, clearly she can't be trusted with anything.

Option C is to take away her favorite things. Mommy and Daddy have said do not do this. If you do this we will take away X and put it away until you are big enough to behave yourself. If the woobie goes into storage for a while perhaps it will help her remember.
Good luck. The stubborn ones are the hardest to raise, but they usually turn into the best adults. We just call it persistance in adults.
