Create your own crystal cave with the BBC Earth Grow & Discover Crystal Aquarium! Dive into the captivating world of crystal formation as you grow colorful underwater crystals that can soar up to 4 inches tall inside the reusable tank. Witness the transformation firsthand, with crystals in vibrant shades of blue, green, purple, and yellow. Make your crystal world look extra realistic with stickers of structures in real caves, like stalactites and stalagmites! Developed alongside scientists, this STEM kit includes a 2-in-1 guide to crystal growing and the science behind underwater rock formation, giving you an inside look at the world's wonders beneath the waves right from home. As you witness the crystals slowly emerge, you'll gain a deeper appreciation for the natural world and the power of scientific exploration! The best part? This product's packaging and paper are made with a mixture of materials from FSC-Certified forests, recycled materials, and/or FSC-Controlled wood — mitigating the risk of the materials originating from unacceptable sources. Whether you're looking for a fun kids science kit, crystal kit, STEM kits for kids, a cool rock kit, or grow kits, this one-of-a-kind set is a great choice! Perfect for anyone ages 6 and older.