Rainbow circle (formerly known as slinky), known as Miaomiao Circle in Taiwan Province Province, is a kind of spiral spring toy and a kind of solid toy. If you put it on the stairs, it will stretch along the stairs and then recover under the action of gravity and inertia, showing an interesting state of "climbing down the stairs"

(1) metal rainbow circle-the earliest rainbow circle was metal rainbow circle.

② Plastic rainbow circle —— With the increasing age range, the price and diversity are constantly changing, and the metal rainbow circle has gradually evolved into plastic rainbow circle.

On the original monotonous size and shape of plastic rainbow circle, Guo Xin innovated it into educational products with various shapes, colors and patterns, which were widely welcomed by consumers.