Is your student TOTALLY blind or just legally blind? Can s/he perceive
light (color) at all? Texture and form projects would be natural focuses,
but lines can be made "feelable" by using wire, string, yarn, incising, etc.
Yarn, for instance, can be dipped in Elmer's glue and placed on waxed paper
to dry. Perhaps a mobile could be constructed using the resulting lines
(and shapes as well.) The student could tie two stiffened, squiggly "lines"
to each end of pliable wire, place the wire on a finger and feel when and
where they balance. Loop the wire at that point, hang it on one end of
another wire with a shape or line opposite and repeat the process. Shapes
are easily made from cardboard or discovered in the environment. Even value
could be discussed through the warmth or coolness of white, gray, colored or
black papers - in fact, this could open up an interesting science-related
area. (I once had a student do a science fair project that used meal worms
to test the warmth of various values of paper.) A lot depends on how truly
blind your student is.
Hope this helps.