"A vibrant promotional poster for an AI Image Creation Contest for students in grades 5 to 12. The theme is 'The Dream World I Want to Be.' The poster features children from different age groups with joyful expressions, standing or sitting with imaginative and dreamy poses. Above their heads, various dreamlike elements appear, such as floating cities, futuristic technology, nature, and animals, symbolizing their imagined dream world. The background is colorful and magical, with a mix of pastel and vibrant tones, creating a sense of wonder and creativity ar 3:4