Tools: used phone cards, yo-yos, scissors, nail clippers, pliers, nails or awls.

Steps:

First, cut the mobile phone card into two squares slightly larger than the axis drag with scissors; Drag the shaft on the small square and cut off the extra part of the small square with a nail clipper; Put the cut small disc in the groove where the yo-yo is put in the mop; Drill a hole in the middle with a nail, and then cut off the protruding part around the hole with nail clippers; Enlarge the hole with the shaft-until the shaft can be inserted.

Yo-yo, according to legend, in the16th century, the hunting people in the Philippines used heavy weapons in hunting and fighting. In A.D. 1700, Youyou spread from China to Nagasaki, to India and from India to Europe.

Yo-yo type:

Yo-yos differ according to their shapes. It is divided into four types: standard type, butterfly type, extra-wide weighted butterfly type and drum type.

1, standard type: suitable for quick play and simple binding action, suitable for beginners.

2. Butterfly shape: It is suitable for complicated knotting movements and is the best choice for beginners to advance to intermediate level. But it's not suitable for quick play.

3. Extra-wide weighted butterfly: for the master, belonging to the game ball. The structure is mostly ball bearings, which have the longest idling time and easy wiring.

4, drum type: suitable for fast playing, but not easy to tie the line.

2. According to its different structures, yo-yo can be divided into three types, namely, integral type, bearing type and clutch type. Different types of yo-yos have different properties and are suitable for different ways of playing.

1, integral type: the structure is the simplest, the whole is inseparable, the rebound time is very fast, it is most suitable for ring playing, and it can make very beautiful and unique thunder, rotating and striking out.

2. Bearing type: including wood bearing, nylon bearing and ball bearing kk bearing, which are detachable as a whole. The rope is sleeved on the bearing and can idle for a long time. Suitable for rope playing and sleeping, and can be used as various fascinating technologies such as tornadoes and crazy clouds. Suitable for middle and advanced players. Nylon bearings can reduce friction and prolong idling time.

3. Clutch type: it can realize long-term automatic return. This is a clutch that uses long-term centrifugal force. When rotating at high speed, the metal ball is subjected to centrifugal force, which makes the clutch open and idle. When decelerating, the clutch is closed and the bearing is fixed because the spring force is greater than the centrifugal force. Suitable for rings and sleep games.