A sphere made of metal that can make a sound. Or by external force. Generally, there is a small long hole below, and a ball is put inside, which can achieve the effect by colliding with the outside.

1. It is used as a toy for children to reduce the burden of parents to look after their children. It is also used to hang on the curtains of supermarkets. Every time people open the curtain, it will make a crisp sound, telling the owner that someone is coming, which will also help to strengthen preventive measures in disguise and prevent items from being lost. Very versatile.

2.？ It is made into decorations for wind chimes and keys. Wind chimes are usually hung by the sea, and the sea breeze blows, and the sound is wonderful. Hanging on the key can also prevent people from hearing it when they fall.

Bells have many uses and are closely related to our lives.