Note: If there are few air bubbles, please let the quicksand stand still to the bottom, the air bubbles are on the top, and then shake, it will generate more small air bubbles, and it will flow more slowly. If you want the quicksand to be slower, you can use a syringe to inject air into it, so that it has more bubbles, so that the quicksand will flow more slowly. Package Included: 1 x quicksand painting Size: 7inch :18cm *19cm 12inch :25cm *26cm Adjust the speed of quicksand As the temperature and air pressure change, it is sometimes necessary to adjust the air and water inside the sand painting This product does not include the needle tube, please buy or prepare locally.