Kaleidoscope (large) also called "stargazer" with beautiful effects.

A kaleidoscope is a mirrored polygonal tube or tube that contains a compartment with colored beads or other colored objects at one end. This compartment is closed on the inside with transparent material and on the outside with transparent material. The other end of the tube contains a viewing opening. Two mirrors, usually at an angle of 30 degrees with respect to each other, run at a slight angle with respect to the axis of the sleeve along its entire length in the longitudinal direction. The end with the compartment faces the light. The user looks into it from one side and the light from the other side provides reflections in the mirrors. These reflections create a beautifully experienced, symmetrical mandala-like pattern, which can then change by shaking the tube. The word "kaleidoscope" comes from Ancient Greek καλός (kalos), "beautiful" + εἶδος (eidos), "form, shape" + σκοπεῖν (skopein), "look". The abolished alternative spelling was kaleidoscope. Quite a few art and cultural institutions in Flanders bear the name 'Kaleidoscope'.