Sodium polyacrylate, also known as diaper polymer. Size of granular is approx. 0.30mm (300microns), Add water to it, this amazing granular immediately turns into a gel
 
Great use for science classes, holiday gifts, stocking stuff, Goody Bag Stuffers
Sensory Bins: Add cups and molds and make sand castle-like creations with the slush form (more water).
Magic Tricks:  Make water “disappear.” Put the dried sodium polyacrylate at the bottom of an opaque cup, show that it is “empty”, pour water in, then flip the cup upside down. The polymer should absorb the water, expand, and stay inside the cup, making it look like the water disappeared.
Make fluffy slime, add it to your favorite slime recipe for a whole new feel.
Science Gone Fun Brand commercial grade Diaper Superabsorbent polymer (also called slush powder) can absorb and retain extremely large amounts of a liquid relative to its own mass.
Make Color slush polymer: Just add a few drops of food coloring to the water before mixing it with the polymer. 
 
Package dimensions: 4 x 6 x 0.25 inch