These liquid hourglass timers are reminiscent of mini lava lamps and make a fascinating fidget toy. Calming - The motion of the colorful liquid bubbles is incredibly soothing. Many people find them helpful for relieving stress and anxiety. Perfect for Travel - Small, lightweight, and easily portable — these liquid motion timers are perfect for keeping kids amused whilst travelling. Multi-Purpose. Can be used at home, in the office or classroom, during therapy sessions, and more.