There is an article in the May issue of Smithsonian Magazine that may be of interest.  It is primarily about a blind anthropologist, but at the end it describes a hands-on model with a recorded button-activated guide she helped create for a dinosaur exhibit.  Not only was it a big hit among visually impaired children, but a sighted boy closed his eyes and tried it out as well.

Naina Mistry
Research Specialist
Freer/Sackler Galleries
Smithonian Institution

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