Use the sliders—or a gamepad—to change the smiley's expression. It is remarkable how little geometrical information it takes for most people to recognize emotional states in this kind of cartoon-like image of a face.
Try setting bookmarks to set up a smiley animation for a story.
This Demonstration was the very first one created for the Wolfram Demonstrations Project.
It was written by Stephen Wolfram (with his children) in about ten minutes.
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