3D Model: A Stylized 3D Coin, Round, Flat, And Bright Yellow-golden, Inspired By Animal Crossing Style. The Coin Has Soft Rounded Edges And A Raised Rim. On The Front, Show An Embossed Eco City: One Small Cartoon House, Two Cute Rounded Skyscrapers, And A Big Leaf Growing From The Center. Add Small Smiling Tree Icons And Playful Eco Details. On The Back, Show A Simple Embossed Star With A Small Sprouting Leaf Inside. The Style Should Be Cute, Pastel-like, Soft Shading, Low-poly Friendly, With Clear Embossed Details.