I happened to see a study that cats are particularly sensitive to hearing, and wearing bells for a long time will cause certain damage to hearing. From this, I thought whether I could make a silent "bell", which has both the image of a bell and specific functions. Later, I found that there is a certain connection between the arbitrary swing of the bell and the random and disorderly movement of the cat teaser, so I designed this automatic cat teaser. Let the cat amuse itself. As the cat runs and jumps, the light spots of the cat teaser shake randomly and no longer repeat, which greatly stimulates the cat's fun of playing and improves the amount of exercise. Moreover, it must be opened manually each time to create more opportunities for intimate contact with the cat and enhance the relationship between the cat and the owner.