3D animated video: A cute chibi baby girl (curly light brown hair, green romper) rides a playful gray hippo on a pond with colorful stepping stones (lily pads, lush forest backdrop, shimmering water). The hippo starts with slow, gentle hops—its hooves tap softly on the stones (making tiny water-drop sparkles drift), and the scene glows brighter with sunlight. It then accelerates into a lively dash (leaping quickly forward across the stepping stones): its body blurs with motion to highlight speed, the smooth gray skin shimmers dynamically, and faint water-splash particles scatter in its trail. As it moves, the hippo continuously blows a steady stream of iridescent water-drop bubbles (glowing with pond light) that drift upward, wobbling gently with the breeze, before popping softly (releasing tiny cheerful-themed glitter). The baby girl holds the hippo’s ears steadily, romper fluttering slightly, feet dangling above the water, and a bright smile as they dash through the cheerful pond scene. Animation style: vibrant, whimsical, hyper-dynamic—add motion blur to the hippo/water and floating bubbles; bubbles sync with the dash rhythm. 12-second clip, 4K, 60fps (ultra-smooth, pond-stepping-stone dash with playful, refreshing interactions).