1. Can be used as a water toy; a toy combination composed of 2 spherical molar balls and a serrated molar stick, two dog molar toys, which integrates multiple functions such as interaction, leakage, and molar. 2. It can also be used as a training ball to train the dog's agility. It can be used by the dog to play with itself, and it can also interact between the owner and the pet to enhance the relationship between the owner and the dog.