Limitations
RECRUITMENT

(1) Given that the continuous test method for young children in this study is real-time and the attention of young children is in the budding stage, attention remains scattered and any subtle interference factors during the experiment may affect the subjects’ real-time attention. The test results will continue to deepen and refine the relevant aspects of this research in the follow-up to constantly improve the test methods, optimize the experimental site and equipment, and minimize interference factors in the test process, thereby ensuring the authenticity of the experimental results.(2) Subjects recruited in this study are young children from cities, and the kindergartens they choose are college-affiliated kindergartens. Their family living environment, economic conditions, and educational methods are relatively good, and their cognitive function and learning ability will also be affected by cities. The influence of cultural and living environment will be better than other preschool children. However, the COVID-19 pandemic had prevented the recruitment of subjects from a markedly wide social group, thereby resulting in the experiment’s certain limitations. In future research, there is optimism that academic ability will be continuously improved and further research will continue in related aspects, such as green fitness for young children.(3) This study’s experimental intervention adopts high-tech VR technology, which has yet to mature mainly owing to the instability of network data, poor image, and lack of overall participation in the natural environment. Compared with the real natural environment, a huge gap is noted, thereby affecting the viewing experience of children to varying degrees. Evidently, the virtual artificial scene cannot be compared with the real nature. However, this study firmly believes that with the continuous development of human technology in the near future, the former can approximate real nature, thereby ultimately benefitting mankind.