With this Magic Crystal growing kit, you will have fun growing your own crystals in just 24 hours. This kit includes everything you need and in just 3 simple steps. The crystals will begin to form into beautiful works of art formations. Full crystallizations will occur after 10-12 days. As the crystals grow, so will your child’s interest in science. Adult supervision is required. Age 8+. 48 pcs. per master case.