Each rattleback has a mind of its own...
Some spin only clockwise, others only counter-clockwise. If you try to spin it the other way, it wobbles and starts spinning in the original direction!
Available wood: Sugar maple or other hard wood
Dimensions: About 25 cm (10 in)
Spinning direction: Clockwise, counter-clockwise and "wise"
Spirals can be found everywhere in Nature, plants, snail shells, seashells, clouds and water paterns, galaxies.... They will represent continual motion and balance. They symbolize the slow reveal of things that are hidden. It can mean growth and evolution. They could represent people coming back to the same point in their life, but with new and better kinds of understanding.