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On the Puzzles with Polyhedra and Numbers This is an article on a set of didactical games edited by the Portuguese Mathematical Society (SPM). http://gfm.cii.fc.ul.pt/people/jrezende/jr_poliedros-puzzles_en.pdf Ul.pt  ~   Site Info   Whois   Trace Route   RBL Check   Amazing Spiro An applet for making spirograph graphs. Includes options for size, color and shape. Allows saving of completed image. http://cgibin.erols.com/ziring/cgi-bin/spiro.pl/spiro.html Erols.com  ~   Site Info   Whois   Trace Route   RBL Check   A Mathematician's Aesthetics In his classic A Mathematician's Apology, G. H. Hardy likened mathematics to poetry and painting. This site elaborates on Hardy's remark with quotations from Stevens, Klee, Fry, and Focillon. Links to related sites are given. http://finitegeometry.org/sc/ph/aesthetics.html Finitegeometry.org  ~   Site Info   Whois   Trace Route   RBL Check   Stunning Friends with Math Magic A collection of card tricks, number guessing games, paper and glue magic, and other math exercises. http://www.cut-the-knot.org/arithmetic/rapid/magic.shtml Cut-the-knot.org  ~   Site Info   Whois   Trace Route   RBL Check   Fast Arithmetic Tips Three categories: defensive - know to check an answer, offensive - fast mental calculations, and math magic. http://www.cut-the-knot.org/arithmetic/rapid/ Cut-the-knot.org  ~   Site Info   Whois   Trace Route   RBL Check   The Diamond 16 Puzzle New version of the classic puzzle using row/column/quadrant permutations to display symmetries of graphic designs. Has link to a site on the underlying mathematics (Diamond Theory). http://finitegeometry.org/sc/16/puzzle/ Finitegeometry.org  ~   Site Info   Whois   Trace Route   RBL Check   Mathematical Spectrum Mathematical Spectrum is a magazine for students and teachers of mathematics in universities, colleges and schools worldwide. It may be read by anybody interested in mathematics as a recreation. http://www.apt.group.shef.ac.uk/ms.html Shef.ac.uk  ~   Site Info   Whois   Trace Route   RBL Check   The Eugène Strens Recreational Mathematics Collection A special collection at the University of Calgary, including the archives of Martin Gardner. There is a searchable online index. http://www.ucalgary.ca/lib-old/SpecColl/strens.htm Ucalgary.ca  ~   Site Info   Whois   Trace Route   RBL Check   Critical Math Articles and images on recreational math from fractals and magic squares to mathemorchids and Galois. http://www.gwywyr.com/articles/scimaths/ Gwywyr.com  ~   Site Info   Whois   Trace Route   RBL Check   Eric's Scientific Book List: Recreational Mathematics Book list from Eric Weisstein including titles, authors, publishers, prices, page count and some have links to Amazon.com. http://www.ericweisstein.com/encyclopedias/books/RecreationalMathematics.html Ericweisstein.com  ~   Site Info   Whois   Trace Route   RBL Check