You can describe a poster inspired by the creation of the Smiley as a piece of art that celebrates the invention of the universal symbol of expression. It often depicts the story behind the creation of the Smiley, highlighting the original idea and cultural context in which it emerged. The poster can be decorative or educational, showcasing the smiling face design in different styles and techniques, and including information about its popularity and use worldwide. In short, a poster about the creation of the Smiley is a tribute to this beloved and widely used symbol.