Features: The pattern is symmetrical. Only one pattern is real, and the others are reflected in the mirror. The pattern effect of the Kaleidoscope: the hexagonal pattern. They are all the same and are symmetrical around a central point. Knowledge Class: The kaleidoscope looks fantastic, but it's actually quite simple. The principle of the kaleidoscope is to use the mirror surface of the equilateral triangle to reflect and refract the beads glass in corner to form a beautiful regular pattern. With the rotation of the kaleidoscope, the flow of beads will randomly changes into a variety of strange and beautiful patterns, so it is called as the name of kaleidoscope. Specifications: Material: Paper + PP Size: 18.5 X 4 cm/7.28 X 1.57" Color: Random delivery (If you buy more than one,the color you received may be the same color or different colors) Ability training: Visual, hands-on and brain, interest training, intellectual development, hand-eye coordination, parent-child communication. Experimental Procedures: Step 1: Roll color paper on the outside of the paper tube, the joint can be pasted with adhesive. Step 2: Sticker the three plastic lenses into a triangle by their hologram side inside with Adhesive Sticker.And then put into the paper tube. Step 3: Cover the one end of paper tube with the white plastic eye cover,and put the clear small round piece in the other end of the paper tube. It is just stuck in the upper part of the prism and left 2cm position for storaging the beads. Step 4: Take out the beads and pour them on the round piece.Put the lens cover and the lens box on both ends of the lens, and the whole kaleidoscope assembly is completed. Note: 1. The color of the accessory are random,please read carefully before buying. 2. Children should play with adult because it contains small accessories and sharp objects, please take care of children to avoid swallowing. 3. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 4. Please allow 1-3cm measuring deviation due to manual measurement. Package include: 1 X DIY Kaleidoscope Kit