Review on Large 7 Inch Blue Muyan Moving Sand Art Picture 3D Deep Sea Sandscapes In Motion Glass Desktop Art Toys For Adults And Kids by Karen Murray

Obviously, the sand floats through the liquid and what causes the sand to fall is gravity. There are bubbles in the liquid that the sand falls through, just like a plinko game. The one I purchased had VERY VERY few bubbles in it. So whenever I flip it upside down the sand all falls at once and just gathers at the bottom. Maybe it's just luck on whether or not you get a good one with lots of bubblesEdit: seller responded with a "replacement or full refund" offer, also offered another practical solution that I'm going to tryEdit: seller suggested adding more air bubbles by use of syringe as there is a small hole on the side of the item for that purpose. Worked perfectly. Smaller syringe the better. Changed from a 2 star to 4 star