Bloom zoetropes are an idea by John Edmark: A shape is put on a turntable and illuminated by a strobe light, so that there is one flash every time the shape has performed a rotation through the Golden angle
After such a rotation, the shape, which is the union of a sequence of smaller shapes, stays almost the same, but each small shape has been replaced by its sucessor in the sequence.
Due to the strobe light, the whole sequence is seen as an animation of the small shapes performing all the same motion, but phase shifted.
This particular shape is based on the Romanesco
plant. The small cones appear to be moving downward on the surface of the big cone. Since each small cone is also rotated backwards through the golden angle about its own axis with respect to it predecessor in the sequence, the even smaller cones appear to move down the surface of the small cones.
This version of the product attempts to achieve higher resolution on the outside. Because shapeways has a limit of 1'000'000 triangles, this means less resolution on the inside, thus thicker walls, higher material consumtion and higher price.
The video shows a computer simulation of what it will look like. It is a video of an old version of this product. I have since improved my model to use less material and have more resolution.