Jane and John Kostick make many mathematically inspired sculptures some of which can be seen here: http://www.jjkostick.com/jjkostick/Welcome.html
For example, Jane made a coffee table whose base is a trefoil knot.
For two more examples of sculptures that Jane built, please see the December 2008 issue of the Girls' Angle Bulletin, which can be downloaded from: http://www.girlsangle.org/page/bulletin.html
