Kaleidoscope will attract kid's attention because the appearance is a retro pattern, and the inside is a variety of geometric patterns, which it has vibrant color and changeable pattern. A prism is composed of some mirrors. The light reflected by the three mirrors will produce symmetrical patterns. The principle of optics is used to allow children to learn physics. It is made of paper, which is durable to use. You just need to rotate it a little, then you can see the wonderful pattern. The large one can be rotated and stretched. The small one can be rotated but cannot be stretched. Item Name: Kaleidoscope Material: Paper Color: Sent by Random Features: Rotatable, Educational Toy, Kids Gift Size Details: Size: Small: 21cm/8.27", Large 2 Section: 30cm/11.81", Large 3 Section: 27cm/10.63" (Approx.) (Optional) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Kaleidoscope (Random Color)