Prepare seven empty glass bottles and dial them in water so that the first was about five centimeters of liquid, and in each following a centimeter more. Put them in a row in accordance with the water level (on growth). Tap the bottles ka a pencil or a teaspoon. Get the audible range of seven notes. You can use these bottles and like a wind instrument for this purpose it is necessary to blow into them. Teach your child to play a new instrument some simple melody, such as "Chizhik-Pyzhik".