Engage in a fun project to grow your own natural Sapphire Blue crystals. Includes a Guide to Crystals. The kit includes base rock, magnifying glass, measuring container, spatula, tweezers, special crystal formula, crystal growing container and instruction booklet, all in reusable plastic box. The instruction booklet includes safety rules, crystal information and more. Also, the instruction booklet has coated pages, so a bit more heavy duty for kids' use. Ages 10 and up.