Children's Worlds, The International Survey on Children's Well-Being (ISCWeB) is a large-scale international survey, supported by the Jacobs Foundation, which maps subjective well-being in children between the ages of 8 and 12. The study aims to understand how children perceive their own environment and along that way contribute to the further improvement of children's well-being. Specifically, the main aim of this study is to make children's perceptions of their own life and well-being. Children's Worlds became one of the first large-scale comparative studies to put the perspective of the children themselves at its centre. With the research, the Children's Worlds project aims to make a database available with data from all participating countries that can serve for cross-cultural comparison. 
Flanders participated in Children's Worlds for the first time in 2018. To map the living situations of Flemish children, the Quality of Life Expertise Centre (E-QUAL), the Youth Research Platform (JOP) and the Knowledge Centre for Children's Rights (KeKi) joined forces. In the third wave, 35 countries/regions participated in the study: Albania, Algeria, Bangladesh, Belgium (Flanders), Brazil, Chile, Germany, England, Estonia, Finland, France, Greece, Hong Kong, Hungary, India, Indonesia, Israel, Italy, Croatia, Malaysia, Malta, Namibia, Nepal, Norway, Poland, Romania, Russia, Spain, Sri Lanka, Switzerland, South Africa, South Korea, Taiwan, Vietnam and Wales. Each participating country interviewed in three learning years situated around the age groups of 8, 10 and 12 years a sample of approximately 1,000 children per grade in each case. In total, as many as 128,788 children participated in the survey. In most countries a sample of around 3,000 children was achieved.