I would first make sure I checked her IEP (Individual Education Plan) It would seem to me those activities are not appropriate for her. I too have a blind student (first grade) and she also has to hold things about 1 inch...at this point...you cannot tell the difference between her work and the other students. Also speak with her SPED facilitator and the specialist assigned to her.
Lowenfeld did a lot of research in the area of teaching art to the sight impaired. There is also other kinds of research...but I would first begin with the IEP. See what the requirements are and work with the team. She cannot be required to do something that her disability prevents her from doing. Her curriculum must be modified to fit her needs.