Smithsonian Magic Rock Set
Magic Rocks Instant Crystal Growing Kit. Create a Brilliant Underwater Garden. Rocks grow to Different Heights up to 4". Includes 1 Space Background Print, 1 Sticker Sheet, 1 Tank and Detailed Instructions. Adult Supervision Required, Conforms to ASTM D-4236. Set contains Chemicals that maybe harmful if mis-used. Read Cautions on Individual Containers Carefully. Recommended Ages 10 Years and Up.