for those who are interested, I published a paper entitled:
A Nuer dance rattle (South Sudan): Plaiting an octahedral shape
in the journal «Visual Mathematics», Belgrade, 2012, Vol. 14, No. 3.
I am preparing a book on plaiting pyramids, prisms and other polyhedra in African cultures.
Professor of Mathematics, Vice-President for Southern Africa, African Academy of Sciences
Chairman, AMU Commission for the History of Mathematics in Africa
President, International Studygroup for Ethnomathematics
Former Rector / President, Pedagogical University, Mozambique