12 pack of Zanny Marbles (Tm)- Each pack Kit Includes: Multi Color Water Marble Ball ( about 300 balls/5g) in Test tube;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.;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 Kid's Science Projeck Kits- Zanny Marbles (Tm): Watch the Tiny Water Marble Ball Grow to More Than 400 Times Their Volume.

12 Pack of Kid's Science Projeck Kits- Zanny Marbles (Tm): Watch the Tiny Water Marble Ball Grow to More Than 400 Times Their Volume.Zanny Marbles