Hello all, many thanks for your interest. i want to answer your question about this toy. it is an minimal surface spanned between th legendary borromean rings. minimal surface http://www.susqu.edu/brakke/evolver/examples/periodic/period ic.html borromean rings https://en.wikipedia.org/wiki/Borromean_rings and with this program you can view and explore "seifert surfaces". http://www.win.tue.nl/~vanwijk/seifertview/ bye oliver