We fine-tuned by adding small amounts of glue or borax, as appropriate. Then, some of us added a small amount of green food coloring to the mixture, so that our mixtures were either green, white, or somewhere in between. The mixture eventually stuck to itself, and ceased to stick to our hands. When we threw it onto the table, it would bounce a little, and then quiver. The material form is called a polymer .
Raisins sink since they are more dense than water.
However, the 7-UP contains bubbles of CO 2 that are less dense than water. These bubbles collect on the raisins, causing them to float. When they reach the surface, the bubbles pop and the raisins sink to the bottom again. The cycle is repeated. It works best with regular 7-UP , rather than the diet variety.