Rockspinner7 (Happyland)

After building Rockspinner 5, the ├╝ber-competent and enterprising staff at Technorama sold a Rockspinner to an amusement park in Switzerland. Selecting another stone from the same quarry in the Italian part of Switzerland, we built a very nice work. This is the only photo I have of the completed work. If you vist the place, […]

Rockspinner 6

This work was shown at the Atlanta Botanical Gardens, Maker Faire San Francisco and is now on display and available in Sonoma, CA @


This is the first work to utilize a motor and a slip bearing. This made the work spin very slowly, but still allows you to play with it. This approach has been abandoned in favor of the surprise that comes from discovering that such a huge thing actually moves.  

Rockspinner5 (Technorama)

This Rockspinner was commissioned for the outside play area of one of the best science museums in the world, Technorama, in Winterthur, Switzerland. The fantastic shop staff improved on the bearing design and above and beyond in fabrication, living up the the Swiss reputation. The stone came from the Italian part of Switzerland, near the […]

Roberts Rock (Rockspinner3)

This work was commissioned by a family who lost one of theirs in a tragedy. It is placed in a nice park and ball field in Northville, Michigan.  

Rockspinner (Burning Man 2001)

Though technically the second Rockspinner, this one gets the title. Weighing somewhere in the 9 to 10 ton range, this stone is much larger than anything previously handled. To build it, we first built a large lifting rig and shipped it out to the desert, then brought in the rock, hung it and mounted it […]

Echo (Rockspinner 1)