We have showcased a space installation using balloons at the Futakotamagawa Rise Terrace Market open event "FUTAKOTAMAGAWA ENNICHI." Under the concept of "Mobile Park (Moving Park)," we produced this as play equipment which can be moved. Six trigger spots are located on a giant tree made with huge balloons, and visitors can enjoy interactive sound play by traveling around the tree. The foundation, created in the image of a pot, features casters, and it can be moved freely for exhibition as long as there is power. This is the largest work so far by PPP, and was intended as an experiment in dynamism in space-based play.