Make slime that thrills with the Elmers Color Changing Slime Kit! Simply shine the inluded UV light on your slime and you ll be able to see it change from one color to the next. It even changes under the UV rays of the sun! This inclusive kit includes 1 bottle each of Color Changing Glue in Blue-to-Purple and Yellow-to-Red. This kit also includes 2 bottles of Elmers Magical Liquida glue slime activator thats a less messy substitute for contact lens solution and baking soda. Spark your kids creativity with custom slime and Elmers!