"Kids will grow crystals on 6 paper coral shapes. The play pattern is the same as our Crystal Garden & Crystal Forest. First, kids will color each paper shape using the included watercolor pens. These colors will determine the color of the crystals that grow. Each kit will contain 2 Carnation Corals, 2 Staghorn Corals, and 2 Brain Corals. Crystals begin to develop within minutes and each coral will be fully covered in as little as six hours. Also comes with a real geode specimen. SCIENCE ANGLE: Kids will learn about crystal growth, the function of coral reefs in nature and the importance of coral reefs to ocean ecosystems. Suitable for ages 8 and above." "Weight : 0.6 kg Dimensions : 28 ? 7.62 ? 30.5 cm Age?More than 8 years old"