Metaverse is a 3D virtual world where users can communicate with each other through avatars. This digital world affects many aspects of the real world and involves many sciences with many challenges. In this regard, legal science also faces many legal issues despite the existence of the metaverse. Regardless of the various legal challenges related to the Metaverse, One of the critical issues is how to protect children's rights in the metaverse adequately. Although this virtual world brings many advantages for children, including the fact that it can be used as an educational platform and interactive environment, it quickly exposes children to various training and skills. However, this technology also creates many disadvantages and risks that make it necessary to pay special attention to children. These include children in this environment being more exposed to cyber harassment or inappropriate content. Despite the necessity of such protection, this research has studied the legal challenges related to the metaverse, especially the impact of this environment on children, with a descriptive and analytical approach. The result of what was investigated became a basis for achieving the research goal, i.e., how to protect children in the metaverse effectively. According to the conclusion of this research, adhering to general legal frameworks and paying attention to specific laws and regulations, benefiting from artificial intelligence and blockchain technology and defining and using special tools can be efficient for the comprehensive Protection of children in the metaverse