A colorful, vibrant children's educational poster designed like a modern social media profile page for a Slavic mythological character 'Vodyanoy' (Water Spirit / King of Water). In the center or top, a friendly, slightly mischievous cartoon character avatar of Vodyanoy: an old water spirit grandfather with green mossy skin, glowing friendly frog-like eyes, long green beard tangled with water lilies and seaweed, wearing a tiny crown of river shells and reeds, surrounded by water bubbles and fish. Around him, stylized infographic UI elements: profile header, username badge, cute icon cards for his house underwater, funny to-do list with fish and whirlpools, danger/friendship status bars, and floating water lily decorations. Bright underwater turquoise and deep blue background with magical sun rays shining through river water, whimsical 3D Pixar style, clean poster layout for school students.
