This study aims to clarify the effect of non-speech sound augmentation (i.e., everyday and instrumental sounds) on outdoor play for children, where has been lacking in empirical examination. In a within-subject observational study, sixteen children (ages 10-11) were divided into four equally sized groups and equipped with SoundWear, which is a wearable bracelet that allowed them to explore sounds, pick a desired sound, generate the sound with a swinging movement, and transfer the sound between multiple devices. Both the quantitative and qualitative results revealed that augmenting everyday sounds led to distinct play types with differences in physical, social, and imaginative behaviors, whereas instrumental sounds were naturally integrated into traditional games. Thus, sound augmentation with specific digital design features (e.g., transparent technology to provide new perspectives, margin for interpretation, and ownership through a sense of achievement) is significant for shaping distinctions in digitally enhanced play and requires considerable design attention.