Design a playful and vibrant background for a Joke of the Day template targeting K-12 students. Use a cheerful color palette with shades of yellow, blue, and green. Incorporate laughing emojis (😂, 😄, 🤣, 😆) in a scattered pattern across the background, ensuring they are not concentrated in the center. Include cartoonish elements like smiley faces and laughter symbols. Maintain a whimsical vibe without excessive clutter, leaving ample space in the center for the main content, including the joke, title, and additional emojis around the content. Ensure text readability against the background. Experiment with shapes, gradients, or patterns to enhance visual appeal. Aim for an image size suitable for digital signage, considering common display resolutions. Optionally, generate multiple variations for diverse digital signage displays. --ar 16:9