Zanny Marbles 12 Pack of Kid's Science Projeck Kits Tm Watch The Tiny Water Marble Ball Grow to More Than 400 Times Their Volume

Each pack size (inch): 7L x 4W x 1.5D inch Weight: 1.1 oz. SAFE NON-TOXIC BIO-DEGRADABLE. Great for: kids party goodies bag gift giving stocking suffer school science project etc. Manufactured by Zanny Marbles. Zanny Marbles Water Marble Ball are wet and wacky soft and squishy fun and funky bouncy and beautiful. They start off hard and tiny. Add water and watch them grow to more than 400 times their volume. Now you can study this process in a test tube environment. This keeps kids fascinated for hours. Comes with a clear plastic test tube with twist-on plastic cap. Bring out the scientist in your kid with this crystal soil toy 12 pack of Zanny Marbles (Tm)- Each pack Kit Includes: Multi Color Water Marble Ball ( about 300 balls/5g) in Test tube