Our program at Cleveland Public Library tomorrow relates to "Making a Mess" - we will make slime and bouncy balls. It helps to know the properties of the materials being used. Here is the American Chemical Society sheet on Borax: http://www.acs.org/content/dam/acsorg/about/governance/committees/chemicalsafety/safetypractices/clip-borax.pdf For the glue - we are using Elmer's school glue - which is described as a polymer polyvinyl acetate: Here are some descriptions for using the glue with various materials to create polymers: http://www.acs.org/content/acs/en/careers/whatchemistsdo/careers/polymer-chemistry.html http://www.acs.org/content/dam/acsorg/education/whatischemistry/scienceforkids/characteristicsofmaterials/polymers/goop-to-go.pdf About Elmer's® Products, Inc. Elmer's® Products, Inc., headquartered in Columbus, Ohio, has been a trusted brand and industry leader for more than 65 years. Elmer's produces a variety of well-known adhesives, arts and crafts, educational and office products for use at home, school or business. Elmer's branded products are developed to provide project solutions and to inspire people to create, build and learn for life. Elmer's also markets the number one instant adhesive in the U.S., Instant Krazy Glue®, and X-ACTO®. For more information, visit www.elmers.com.--this book is excellent resource for the program and inquisitive students.