Function: A rotating interactive tabletop showpiece used for stress relief and room decoration. When flipped, the heavy colored sand falls through a barrier of air bubbles to form distinct, unrepeatable landscapes resembling mountains, valleys, or deserts.Design: Features a circular glass frame holding green sand, water, and air bubbles, resting on a white crescent-shaped plastic stand.Maintenance: Many models feature a small, hidden air regulation port along the outer rim. Owners can use a syringe to fine-tune the amount of air inside; adding a small amount of air slows down the sand's descent, while removing air makes it flow faster.