3 years & up. This set of Sensory Liquid Hourglasses will captivate and fascinate kids.
Turn each hourglass upside down and watch as colorful oil collides with water for form different size droplets that rise or fall in a variety of ways. Ideal for developing quiet focus and simple scientific principles, sparking curiosity, and more. Outside casing made from durable, non-toxic plastic. Size: 2.75" x 1.75".