The structure of the paper is as follows: the next section describes designing for
vulnerable children, illustrated by a learning app design for a special education class in a
primary school. Section three describes a case of designing social media privacy settings
with teenage hospital patients. This section is followed by design for elderly, where
design efforts aim to reduce the sense of loneliness and increase the understanding of
how elderly view technology in their lives at present. In section five, we discuss the
methodological and ethical challenges we experienced in our studies, including parallels
and differences between our groups, followed by some concluding remarks.