I know two little girls and a father who do exactly this. They routinely shear off their long hair and donate it all to "Locks of Love", an organization that will make natural hair wigs for those in need.
excuse the mess. I'm sitting in the floor giving Ziva a haircut. So there is hair and towels everywhere. I just had to snap this pic of her looking at me as if to say "Mommy please hurry up with my hair!