Using this product is super easy. Just open the blind box and enjoy the surprise of finding which Sanrio character is inside. As for note, remember that each box contains a random character and duplicates can happen. Also, once you open a box, we can't take it back or exchange it. To maintain your little Sanrio character, keep it in a clean and dry place. Avoid dropping it as it might break. And that's all you need to know to have a great time with your NANOBLOCK Mininano Sanrio Characters!