This item has been sitting on the display shelf at my parents' house for a long time, but I've decided to sell it. The surface fabric is likely synthetic. There are no stains. I'm not sure what's inside, but it seems to be small, round objects. It's a ready-made product. Each one weighs about 40 grams. The base is about 6 cm square, and the height is 7 cm. I've priced it this way because of the shipping costs.