Hello, let me give you a professional answer: your son is only four years old and belongs to a person without civil capacity. You paid for sending the child to kindergarten. In fact, you transferred the child's guardianship obligation to the school through the contract, and the school must bear the guardianship responsibility. According to the laws of our country, kindergartens, schools or other educational institutions should bear the responsibility if a person without civil capacity suffers personal injury during his study and life in kindergartens, schools or other educational institutions, but those who can prove that they have fulfilled their educational management responsibilities will not bear the responsibility. In your child's case, the school must provide its own exemption certificate. If it cannot be provided, the school will bear the adverse legal consequences of inadequate proof. In other words, the school must pay compensation! Here, you don't need to provide any proof, and the burden of proof belongs to the school. All you have to do is complain to the competent court! If the school gives some exemption certificates, such as proper management. Then you have to do it, which in turn proves the negligence of school management. In the case with you, the school lost a lot, so according to the materials you provided, you can boldly sue, and your chances of winning are quite high! !