Folding and cutting spheres. Awesome symmetry balls include card constructions by George Hart, which you can learn about here (and others are on ... ): ... and the Gardner Ball by Oskar van Deventer with design by Scott
by Origamite - Origami Video
by Make:
by Maria Fernanda Minauri
by Architact Collective
by rizal fauzi
by Fotodiox Inc
by Diego and Hollie Ortiz