My daughter did something like that once. I didn't believe she could do it, because she didn't have a pattern, and she was eleven, and she can't do buttons or fasten clasps or manipulate many other small objects. I left her alone, though. She had a shirt and a skirt and some material, and she spent about 4 hours totally silent, refusing to talk or pee or eat, and she finished up with a pretty amazing gauzy ballerina princess thing.
Making your own stuff is always cool.
