Welcome back to Spangler Science Saturdays in October. Halloween just isn’t Halloween at my house without a huge batch of slime. At this time of year, my daughters’ friends hang out at our house begging me to make slime with them. It’s sticky. It’s icky. It’s gooey. It’s a must-have at Halloween.
Making slime is also a great way to teach about the properties of a polymer… or a long chain of molecules. The molecules start out as a liquid in this slime recipe but are quickly hooked together with the introduction of the Borax. The Borax solution is the “cross-linker” in the creation of the Slime polymer. Borax molecules are like tiny paper clips that hook together the long chains of molecules making a slippery, gooey concoction known as Slime. Slime can either be made using Elmer’s Glue or a liquid called polyvinyl alcohol (PVA).
Elmer’s Glue Slime