String Slime™ – Vampire Color-Changing – 32 oz

(4 customer reviews)
  • Turn from eerie green to blood red when you hold it up to the light.
  • Battery-powered black light included
  • Vampire Veins features a special dye that reacts to both regular and ultraviolet light in different way
  • Explore the science of building polymers by cross-linking long chains of molecules