The aim of this paper is to explore the perception of participation right of children in Estonian society from the perspective of adults and children by taking into consideration their sociodemographic background. The study draws on data from Estonia's Second Children's Rights and Parenting Survey (2018; a sample of 1,063 children at age 10–17, and 1,083 adults in the age range of 18–74). The study focused on children's and adults' attitudes, knowledge and experiences concerning children's involvement in decision-making in matters related to children's lives, as expressions of the right of participation. The findings demonstrate the generational and gender differences between children and adults in their perceptions. The study confirms the association between the awareness of children's rights and support to children's possibilities to participate in decision-making in different aspects of life. Furthermore, the analysis shows the importance of the children's own experiences of involvement: children who have more experiences with having a say in issues related to their everyday matters tend to be supportive of the involvement of children.