Watch as these amazing polymers absorb 200 times their volume of water! JellyStones change from small hard pebbles into large squishy shapes in a matter of minutes. They can be used over and over again for hours of entertainment. JellyStones are used during droughts to help crops survive because they absorb so much water! Perform amazing experiments and reveal the science behind JellyStones! Safe for ages 3 and up!