Water is Compound of Hydrogen and Oxygen
Select this project to show that water molecules are actually a compound of hydrogen and oxygen gases.
This project involves a fascinating experiment in electrochemistry that illustrates several important processes, and provides an ideal context for discussion of several issues related to chemistry and electricity. 
Material and instructions
You will have many choices for materials that you select for your experiment. An energy source such as a battery, water, wires and almost anything else that you may need can usually be found at home or can be obtained locally.
Details of this project
More information or support for this project is available for the members of ScienceProject.com. You may also find a Science kit for this topic at MiniScience.com.