3D animated video: A cute chibi baby girl (white bob hair, pink-yellow heart outfit) rides a playful spotted deer in a castle-themed playground (colorful bunting flags, block props, pink-spired castle backdrop). The deer starts with slow, gentle steps—its hooves tap softly on the tiled ground (making tiny flag-shaped sparkles drift), and the scene glows brighter with sunlight. It then accelerates into a lively dash (trotting quickly forward through the playground): its body blurs with motion to highlight speed, the soft brown fur shimmers dynamically, and faint bunting-particle trails scatter in its wake. As it moves, the deer continuously blows a steady stream of vibrant flag-shaped bubbles (matching the playground’s decorations) that drift upward, wobbling gently with the breeze, before popping softly (releasing tiny festive-themed glitter). The baby girl holds the deer’s reins steadily, outfit fluttering slightly, feet dangling above the tiles, and a bright smile as they dash through the cheerful castle playground. Animation style: vibrant, whimsical, hyper-dynamic—add motion blur to the deer and floating bubbles; bubbles sync with the dash rhythm. 12-second clip, 4K, 60fps (ultra-smooth, castle-playground dash with playful, festive interactions).