Children today grow up in cities built for efficiency, not exploration. Across the world, screen time replaces outdoor play, and access to green spaces remains deeply unequal. Yet research shows that contact with nature is vital for physical health, emotional development, and social learning. Parks with trees, shade, and natural terrain keep children active longer, help them cope with heat, and nurture empathy for the environment. Reimagining urban space through greenery is not just about leisure; it’s an investment in public health, equity, and the next generation’s relationship with the planet.