They grow right in front of your eyes, and how cool is that? This kit gives kids everything needed to grow seven beautiful crystals, of varying colors and sizes. Seven display bases, from small to large, feature hexagonal transparent covers, so kids can proudly display what they've "grown." Includes everything needed, from mixing bowl to spoon, so raiding the kitchen will be strictly for snacks. Recommended for ages 10 and up. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.