The modular playground ‘MOA’ can be applied by selecting modules according to the region and environment. Each module gathers to create a new play space, or transforms it into a new play facility combined with an existing playground. ‘MOA’ consists of ‘MOA module’, ‘SOA module’, ‘OLA module’, and ‘SSA-A module’. Each module has different functions and can be combined together. First of all, the ‘MOA module’ plays a role in holding the basic shape of the play space made of curved surfaces. It should be able to deviate from the vertical and horizontal frame of existing playgrounds. ‘SOA module’ is a module with a built-in beam projector. Interactive images are played in the shadowed space of the playground to stimulate children’s interest with visual stimulation. ‘OLA module’ is a form of ‘MOA module’ combined with a climbing handle. It reflects the challenging needs of children to climb somewhere. Lastly, the ‘SSA-A module’ is a horizontal block-type module. It can create a quiet space where you can sit and relax. It allows the children to rest or sit in during break time or play with their friends while sitting. It also serves as a space for parents to watch their children play. ‘MOA’ reflects the changing needs of children. It can be transformed into a new play space by adding on to the existing play facility, rather than demolishing it. Also it can be distributed in various forms according to the local environment. ‘MOA’ pursues a sustainable playground that is perfect for children in the 2020s.