I'll be in Peru soon - a full day plus [Added in edit: no; my mistake] two half days in Cusco before hiking starts, then a 12-hour (more or less) layover in Lima on the way home. I'd like to see some real quipu* and hopefully shoot a brief GoPro video of me with them for my college information systems classes and as supporting material for a book on the subject. Does anyone know where I can find some in either of those two cities that are open to the public and where photography (no flash) would be permitted?

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*An Inca record-keeping and calculation system based on tying knots in strings. The kinds of knots and arrangement of strings conveyed a great deal of information. Since the Inca language had ten consonant sounds and the numbers were in the decimal system, quipu could also be used to store text, but that got awkward beyond very small amounts.