[COD] yixiayun Water DIY Colored Rotating Kaleidoscope Kits Science Educational Craft Kid Toys

8 Years and Above. 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 in corner to form a beautiful regular pattern. With the rotation of the kaleidoscope, the flow of beads will ly 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: 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. Exper