Explore the fascinating science of crystal growing in the palm of your hand! Watch your crystals start forming overnight and continue to observe their growth each day. Each kit includes the materials you need to grow a beautiful, sparkling crystal and a full-color manual that offers step-by-step instructions and fun scientific information. Assorted colors chosen at random. You receive 1 crystal kit per order. WARNING: Science Education Set. This set contains chemicals [and/or parts] that may be harmful if misused. Read cautions on individual containers [and in manual] carefully. Not to be used by children except under adult supervision. Back: WARNING. Not suitable for children under 8 years. For use under adult supervision. Contains some chemicals which present a hazard to health. Read the instructions before use, follow them and keep them for reference. Do not allow chemicals to come into contact with any part of the body, particularly the mouth and eyes. Keep small children and animals away from experiments. Keep the experimental set out of reach of children under 8 years old. Keep the packaging and instructions, as they contain important information.