This heart-shaped timer is not just a decorative hourglass but also an educational science toy. It demonstrates the principles of thermodynamics in a fun and engaging way. Simply hold the bottom bulb in your hand, and watch as the liquid rises to the top, creating a fascinating display. It's for children’s science experiments or as a unique desk ornament. Features -Color:Assorted Color -Material:Glass -Size:17.50X4.50X4.50cm/6.88X1.77X1.77in -Unique design: this innovative design combines the hourglass with a spiral hand boiler, creating a truly unique and eye-catching piece -Educational tool: ideal for science classes, this tool vividly demonstrates principles, making learning both fun and interactive -Heart-shaped timer: the heart-shaped design a and warmth, making it a charming addition to any home decor -Elegant decor: with its elegant and artistic design, this decorative piece enhances the visual appeal of any room, adding a touch of sophistication -Soothing effect: the liquid the hourglass offers a soothing and mesmerizing effect, it's for moments of relaxation and tranquility Package list: 6 x temperature hourglass timer