Rolling Ball Sculptures

I love rolling ball sculptures (wikipedia). I found out that they come in all sizes, not just the big ones I've seen in museums.

• • Tiny desktop

  • large desktop

  • wall hanging

  • large free standing

  • enormous Museum types

  • Ceiling, Wall

  • Kits: all sizes

There are several places on the web that tell how to make them, but none of them have all of the info in one place.