Liquid Motion Bubbler relieves stress. Watching colored oil form into bubbles and float slowly through water relaxes our bodies. And soothes our minds. Hour glass shape is easy to grasp. Simply turn bubbler over to restart the magic. Perfect for quiet concentration. Inspires curiosity. Introduces simple scientific principles. Describing what’s happening builds descriptive language. Measures 2″L x 5 3/4″H. Comes in assorted color combinations. Sold singly or as a 3-pack.