Afarion iPlayground is a sandboxed, browser-only environment that lets students and researchers write, run, and visualize real simulations without installing anything. It removes the complexity of setup, executes scripts in a secure sandbox, and provides real outputs--logs, traces, animations, and performance metrics. By enabling immediate validation of both manually written and AI-generated simulation code, iPlayground makes learning code and simulations simple, interactive, and fully hands-on.