Juno's spinners are polyhedral models that Junichi Yananose has discovered that links and transforms. With a simple operation, it expands and shrinks. The usual model of the Juno's spinner consists of two elements. A rotational joint that connects the end of each element, and the whole model transform together by a motion being transmitted through the joint. Rotational movement of an element changes the distance of each element. The Truncated Icosahedrons' model for the workshop consists of 4 types of elements (two types of narrow inner elements and pentagonal and hexagonal outer elements) and 150 rotational joints.