I will teach Art to visually impared students, any suggestions for lessons?

Question by elec_tro_lux: I will teach Art to visually impared students, any suggestions for lessons?
I teach multihandicapped middle school blind children. Art is part of the curriculum, and I really need some suggestions as to how to approach art with the visually impaired.
Art will be a 9 week unit.
WOW so many great replies! Thank you to all that helped out!

Best answer:

Answer by BigWag
How about Sculpey?

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