Rainbow Crystal Soil Brand Water Bead Balls are water expanding beads, this water beads set of 10 x 10g bags is enough to produce over 3-4 Gallons of water balls beads. Water Beads non-toxic Water Balls. These water beads expand over 1/2". Additional Details ------------------------------ Bullet point: What Are Water Beads ? - Water Beads Are A Super Absorbent Polymer Not Unsimilar To The Material Used In Diapers. So When They Get Wet They Absorb Water And Turn Into A Gel Marbles And We Get Water Gel Balls So Simply Soak All These Purple Water Beads / Water Growing Balls In Enough Water And You Will Get Approx 5 Gallon Of Jelly Water Balls That You Can Use For Many Different Room Decoration Uses Such As Purple Water Beads For Floating Candles Or Soil Replacement For Plants.