Demonstrate this by spelling several names. Then point out that the notes on the screen will always make the same pitches. Play the notes to demonstrate. Then, tell them they can make the music sound different using these same pitches by playing each pitch long or short, just like they can make the letters of their name look different by choosing different colored markers or crayons to write with. Click on any country to hear a sample of that country's music.
Suggested countries are USA, Great Britain, Mexico, Canada.
Listen to the music. After hearing a piece with a distinctive melody, play just the melody line on the keyboard. Repeat this procedure without comment, using the same piece of music. Then, explain that many instruments are used to make the sound from the computer, but that the melody line is played using only one note at a time. Explain that the melody line is the most important part of a song, that it is the part people recognize when they hear a song.