Physical dimensions of children's touchscreen interactions: Lessons from five years of study on the MTAGIC project

•Five years of study examining children's touchscreen interactions compared to adults’.•Data has been collected from over 180 people (60 adults, 120 children).•Results focus on findings that are robust to screen size and touchscreen platform.•The set of cumulative design recommendations captures in one place an easy reference for future design.•Open questions in the design of touch-based interactions for children on future platforms.