uses a large mist generator, fans and a carefully-shaped structure
to produce a large tornado. Since the Exploratorium first produced
this crowd-pleasing exhibit, it has been duplicated in many museums.
Our fourth generation version is intentionally de-tuned so that
random air currents can cause both the creation of a tornado and
its temporary cessation. This latest Tornado is chaotic and unpredictable
much of the time; it wanders off the source of the mist, slips
out of the grasp of the shearing winds and presents a delightful
and ever-changing image.