It's relaxing to see the sand falling while you're working and a fun conversation piece too. It's glass but because it's round it's easier to handle for smaller hands.
It is picked up on the table, rotated, and placed horizontally like a photo frame.Watch the mountains, valleys and dunes that form in front of your eyes!
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.