A vibrant cartoon with colours and smooth animation. Create an original 9:16 vertical short video in colorful high-quality 3D cartoon animation. Scene: A cheerful young child discovers a pile of large colorful geometric blocks in a sunny magical playroom. The blocks suddenly float into the air and spin around the child. Fast, energetic pacing with 5 short visual beats: 1. The child looks surprised as giant colorful blocks float upward. 2. The blocks quickly snap together and become a tiny magical playground. 3. Cute ORIGINAL toy animals appear and play glowing drums while colorful shapes bounce around them. 4. The geometric shapes transform into huge soft pastel bubbles that float toward the camera. 5. The bubbles pop into colorful paper-like shapes that swirl together into a giant bright heart-shaped cloud, followed by a wide cheerful reveal. Use smooth character animation, expressive reactions, playful camera movements, quick push-ins, whip pans, low-angle shots and close-ups. Bright cheerful lighting, saturated but pleasant colors, soft rounded shapes, polished children's 3D animation, clean background, fluid motion. Keep every character, toy, environment and design completely original. No existing cartoon characters, no logos, no brands, no copyrighted assets, no text, no subtitles, no watermark. Duration: 10 seconds. Make the action easy to understand visually and keep the energy high from beginning to end.