Experiment Set - Traffic Light

Chemical traffic light — a beautiful colorful reaction! The liquid changes color step by step: green — red — yellow.  

The reaction can be reversed simply by shaking the solution.   

Packaged in a blister with a euroholder.  
Contents:  
-Blister - 1 pc. 
-Gloves - 1 pair. 
-Stirring stick - 1 pc. 
-Instructions - 1 pc. 
-Cup - 1 pc. 
-Glucose with the addition of indigocarmine. 
-Sodium hydroxide.