In the first two decades of the 21st century, urbanisation along with the virtualized social and educational methods, childhood today is increasingly becoming an indoor experience. Under urban densification, a high percentage of childhood is lacking outdoor activities, especially when nature is not accessible enough in the city. The range of the space where children are free to reach and explore the environment is decreasing with the exclusion of consideration of the need for children in urban planning and design. Growing up with little connection to nature is not only negative for mental/physical well-being, but helps create a society that forgets the biophilic needs of humans and ends up building a natureless environment and lifestyle. The research method is to review existing studies about the impact of urban densification on healthy childhood; and how the biophilic city model can contribute to enhancing childhood development. The research is aiming to conclude effective methods for planners and designers to create a city where children can develop a healthy childhood in an urban environment with abundant natural experience.