Die sieben Raben (1970)

A farmer and his wife had a girl in addition to their seven sons. An evil old woman turned the boys into ravens because she had not been invited to the christening. When the girl turned seven, she learned of the sad fate of her brothers and set out to redeem them. Her journey to the end of the world, to the sun, moon and stars, was adventurous and full of danger. But the girl persevered, found her brothers in the glass mountain, was able to rescue them and return with them to her parents' house.