Sounds fine to me! Bringing the materials was a nice thing to do, and letting her have time to fix it I think just shows her that her work is important to you. (Important enough to change the schedule.) Like Mewzard said, if you'd taken over and fixed it for her I'd think you might have overstepped a bit, but the way it panned out she faced her disaster and overcame it - even if it's lumpy. When I would start to object would be if you had shielded her from the disaster or from having to deal with its consequences. I have no objection to parents being kind and helpful to their children - only to parents who keep their children from facing mistakes and minor misfortunes.
