The articles in this special section explore the use of pervasive technology by and for children and teens. A number of pervasive computing products and services are now available for play, education, learning, and smart living. It is, therefore, important to understand how they affect—and how they are used by—children and teens who are growing up taking this technology for granted. These technologies may be appropriated by children in ways that have not been foreseen and may influence child’s development in important ways. It is, therefore, important to develop ways to design and evaluate pervasive technology in relation to children and to develop technology suitable for children and teens and their needs.