Decorate your garden with the mirrored gazing balls painted from used bowling balls. 30 Low-Budget Makeovers You Could Do With Spray Paint
John from Pottery Works uses an extruding gun to make this fish bowl, but something inspired by this could be created with open coils.
Great tutorial on making these large balls. I wonder if archeologists 2000 years from now will wonder what their purpose was! (back yard concrete)