Introduce your child to geology and chemistry with this STEM glow-in-the-dark crystal lab. With this kit and learning guide, your child can get hands-on learning about crystals formation. This kit from National Geographic will spark a love of science in your child that will last a lifetime.Details:Glow in the dark6.18" x 2.25" x 9.25" (15.7cm x 5.7cm x 23.5cm) package size8 kitsCrystal solution, plastic, rock and paperFor ages 8 and up