May I ask how to play the gyro?

The square is placed in the center, the triangle is placed at the bottom with the top corner down, the circle is placed at the top, and the three are strung together with matches.

The gyro is the earliest Han folk entertainment tools, also known as the dora, Minnan language called "dry music", the north is called "ice brochette" or "playing the old cow". The shape of the upper part of the round, the lower part of the sharp. Once upon a time made of wood, modern plastic or iron. Playing with the rope can be wrapped around the rope, and force the rope, so that the upright rotation. Or use the elasticity of the clockwork to rotate. Traditional ancient gyro roughly wooden or iron inverted conical shape, play with a whip to split.

Modernly, there are a variety of materials (e.g., steel, plastic, etc.) and shapes (e.g., heap type). Of course, there are also some "hand-twisting gyro" is very popular. Gyro is a very familiar toy to teenagers. It is popular all over the world. China is the old home of the gyro. From the Neolithic site in Xia County, Shanxi, China, stone gyros have been excavated. Visible, gyro in China at least four or five thousand years of history.

The gyroscope in the rotation, not only around its own axis rotation, but also around a vertical axis for cone-shaped movement. That is to say, the gyro around its own axis on one side for the "rotation", on the other side around the vertical axis for the "into motion". That is, the gyro is not vertical on the ground, but to the ground normal has a certain deviation, some tilt to the ground. So the moment of gravity on the gyro is not zero, and the gyro into the angular momentum can balance the role of gravity moment, so the gyro in the rotation will not fall to the ground. Gyro around its own axis for "rotation" speed, determines the size of the gyro swing angle. The slower it turns, the larger the swing angle, the worse the stability; the faster it turns, the smaller the swing angle, and thus the better the stability. And the shape of the gyro also has an impact on the gyro into the movement. This is similar to people riding bicycles, the difference is that one is for linear motion, one is for conical curve motion.