You need to be more specific...what kind of art? Painting? Ceramics? Sculpture?
You can find examples of authentic Native American Art at Discovery Path. You can also find unique and beautiful examples of Native American Art at Thunder Heart Drawing and Wind Spirit Teachings.
The Lascaux caves
what can we infer about native american cultures that created the rock art
adze
Janet Catherine Berlo has written: 'The Early Years of Native American Art History' 'Native North American art' 'Quilting Lessons'
The Southwest
Tom Laughlin is not a Native American, or at least he does not claim to be by any public method. His "Billy Jack" films were inspired by his observance of how Native American's were treated, and his casting strongly favors them for these films.
Southwest
You can find authentic Native American flutes for sale at reputable online stores specializing in Native American crafts, at Native American cultural events and powwows, or at local Native American art galleries and shops. Be sure to verify the authenticity and craftsmanship of the flute before making a purchase.
Indian Schools
thier is not
Materials.....hmmm. sewing kit!