The authors have turned the Zoetrope, initially an optical toy from the pre-cinema era, into a three-dimensional (3D) animation display. “Crystal Zoetrope” is a new visual medium involving a glass disc with numerous engraved objects that displays a sophisticated 3D animation. It can be built in small sizes and even be embedded in everyday objects or environments. Using this new visual medium, the authors produced the 3D animation “Sea of Stars” that portrays the life cycle of planets in the universe.