This project addresses the challenge of engaging children in the planning of educational spaces, considering their inherent difficulty in envisioning future environments. A core insight was that children’s input is most valuable at the needs-definition stage, rather than in design execution. The tool was designed as a digital platform to enable scalability, making it accessible for broader community and institutional use. In the short term, it serves as a measurement and assessment tool for identifying children’s needs. In the long term, it holds the potential to establish a new standard of "Child-Oriented Building Codes." Using design thinking and psychology-based gamification, the sandbox tool bridges the communication gap, allowing planners to incorporate children’s perspectives into the briefing stage of planning. This approach aims to enhance children’s quality of life by ensuring educational spaces truly reflect their needs.