We play with toys, but we play games. A ball is a toy, but baseball is a game. The best games are made with toys. Thinking back to Mario 64. The way Mario feels is the foundation of the game. So before creating levels, Mr. Miyamoto (principal director) had a test garden made. An environment where a user could move Mario around. Pick up objects & interact with the surroundings. A toy playground where they could test & refine how Mario felt. In web development, this would be like Storybook. Rendering components in isolated environments. Components lose their purpose when they are not wired together in an app. They turn into toys you can play with. Where you can test & refine how they feel.