With the development of the digital environment, the online risks for children are becoming more complex. The original 3C model was developed by EU Kids Online in 2009 and identified the basic risks that children can encounter online. The 3C model has identified three basic risksof online risks that children face: risks related to content (children are recipients of content), contact (children are participants in undesirable contacts) and conduct (children are participant sin risky behaviours). With the increase in the commercialization of the Internet, the tendency to include a fourth ''C'' has been recognized in order to better understand online risks and find ways to mitigate them. The 4C model contains four basic categories of online risks – content, contact, conduct and contract risks. Thus model has been widely use din EU Kids Online and Globak Kids Online surveys. Research projects like these seek to offer complete data on the online experiences of children from all over the world. Based on the dana obtained through these projects, policymakers and practitioners can devise strategies to improve children's safety in the digital environment. Only by constantly adapting and improving access can children be ensured that they can make the most of the benefits of the digital world, while at the same time being protected from online risks. Further research is needed to systematically adapt and upgrade the model in line with changes in the digital environment.