Opole/poland - Mar 25 2017: a Laboratory Employee in a White Protective Gown Puts a Glass Flask With Water, Replaces the Containers With Reagents and Controls How the Girl Makes the Experiment. the Laboratory Assistant Explains and Shows the Girl on an Excursion How to Pour a Single Glass Bulb Into Another Water, a Chemical Reagent. Experiments With Water, an Entertaining Boring Science, Children Are Curious, a Thirst For Knowledge, to Make a Self-Building, a Happy Enthusiastic Child, Very Interesting, Spectacular. Contented Girl Herself. Clear Cloudy Blue Bacteria Dirty Water.