This research investigates current and potentially desired opportunities available for children’s afterschool activities in the U.S. Buffalo metropolitan area. By analyzing and geographically visualizing travel paths, excluded children’s activity space, and existing activity opportunities in the 3D view using GIS, the study looks at how children’s activity opportunities are limited by any socio-spatial factors such as racial distribution,
median income, current transportation system and geographical distribution of activity opportunity. Especially, it focuses on finding out if there have been children’s unequal activity opportunities between the city and the suburban area. There is an abundance of research that has looked at accessibility to opportunities based on the transportation system. However, only few studies have focused on children’s mobility even though their mobility is typically constrained and tied to those of adults in the household. With more direct engagement with children and representation of their activity space in GIS, this article is intended to discuss transport exclusion and related socio-spatial constraints from the perspective of children.