The Electrolysis tool isolates the use of a liquid as a conductor by presenting an electrically driven chemical reaction. So the the energy transformation is Electricity > Reaction. Which on the concrete, sensory level is a matter of making bubbles. A point of interest is that the bubbles are of two different sizes and can be named, Hydrogen the smaller on the aluminum rod and Oxygen the larger on the copper rod.
   The tool offers assembly and dis-assembly as part of the process. It further offers the preparation and addition of a solid chemical, salt, to increase the reaction rate.
     There is a control of error regarding the assembly of the battery to the tool and polarity. The copper electrode must connect to the negative side of the battery, If not the copper immediately and visible oxidizes, changing color and the reaction shuts down. The copper rod is easily cleaned which is a practical life exercise similar to metal polishing.
      Finally, the tool concretely presents four Elements of the Period Table and the associated vocabulary: Copper, Aluminum, Hydrogen and Oxygen.

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