FAST GROWING CRYSTALS IN 6 COLOURS - Red, green, blue, purple, yellow, and glow-in-the-dark; crystal chemistry has never been so fast (grows in 3 - 4 days), fun, and colourful! The perfect educational gift for boys and girls. GROWING IS EASY - Easy-to-follow instructions and 2 silicone growing chambers make growing your crystals easier than ever. Our new clear crystal seed rocks can be left in your delicate crystals, and grown crystals can be placed directly into your display. NIGHT LIGHT DISPLAY - Show off 5 of your favourite home-grown crystals in the included light-up display! This fun kids STEM activity can help inspire a lifelong love of science and learning. INCLUDES REAL CRYSTAL SPECIMENS - Start or expand your rock collection! This kit also comes with 4 real gemstone specimens: rose quartz, fluorite, blue calcite, and quartz geode. Learn about the gemstone specimens in the kit with the included, full-colour learning guide. SATISFACTION GUARANTEED - The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.