Order now at http://www.stevespanglerscience.com/product/jelly-marbles-jar lace these tiny, solid spheres in water, and in just a little while you will have your own Jelly Marbles. These superabsorbent marbles are the newest craze around the Spangler Science offices! What starts out as a 3mm pebble, quickly becomes an approximately 20mm ball of jelly! Similar to our Water Jelly Crystals, these Jelly Marbles absorb a lot of water, plus they maintain their spherical shape when they are done growing. Not only are these superabsorbent marbles fun, they teach a valuable lesson about the power of polymers. In fact, Jelly Marbles are an example of amazing Hydrogels... superabsorbent polymers that are saving the environment.