This thesis addresses the growing issue of loneliness in urban areas—especially among the elderly, single parents, and children—by investigating how playful, sensory-integrated environments can foster social connection. Focusing on Pendrecht in Rotterdam Zuid, the study draws on Johan Huizinga’s Homo Ludens to explore play as a spontaneous, sensory experience that supports well-being. Using a holistic, multi-method approach—including ethnographic research and spatial analysis—the study finds that loneliness is linked not just to social factors, but also to physical and environmental conditions. Challenges vary across age groups, pointing to the need for inclusive, accessible, and stimulating public spaces. The thesis proposes “playful peripheries”—networks of sensory-rich, welcoming spaces around Pendrecht—as a design strategy to encourage curiosity, interaction, and environmental health. Ultimately, it argues that combating loneliness requires designing urban spaces that promote both human and environmental well-being through play, accessibility, and sensory engagement.