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 10 Minute Crafts
by Janelle Estep
by DIY AQUAPROS
by Ravey D
by rinky haydar sonia
by JANA ART
by Emily Hall