A vibrant cartoon with colours and smooth animation. Create a colorful and funny 30-second 3D animated cartoon for children. Three cute kids are playing in a magical forest when they discover a huge glowing rainbow egg under a tree. One child says, "Wow! What is that?" Suddenly, the egg starts shaking and cracks open. A tiny adorable baby dragon jumps out! The baby dragon tries to breathe fire, but instead it blows hundreds of colorful bubbles into the air. The kids laugh and chase the bubbles. Then the baby dragon sneezes loudly: "Achoo!" A giant rainbow suddenly appears above the forest. The kids cheer, "Wow!" The baby dragon smiles, and everyone dances together under the rainbow. Style: cute 3D cartoon, colorful characters, magical forest, funny expressions, smooth animation, cheerful music, bright lighting, child-friendly, happy ending.