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! Developed alongside scientists, this 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! Perfect for anyone ages 6 and older. Details: Multicolor 8.25" x 5" x 1.75" (21cm x 12.7cm x 4.4cm) aquarium size Make crystals in 5 simple steps Reusable aquarium STEM learning For ages 12 and up Contents: 1 crystal aquarium tank4 crystal-growing rocks2 crystal-growing solutions2-in-1 poster and guide