There are other recipes for Flubber here, but this is the one I always use. From the Children's Museum of Houston. Great to do with the kids. Educational, too: "Combining the borax and glue with water causes a chemical reaction that forms a new compound with its own unique characteristics. Notice how the flubber can be molded and then returned to its original shape unlike glue, which becomes solid, or the powdery borax." I always buy school glue on sale before school starts and save it to make this through the year. I have never had this stain and it is easier to clean up than playdoh. Most fun at room temperature. Would be great as a party favor.