All you need is a resistor of 100 Ohm, a Speaker, additional two push buttons an arduino X and
the X-Mas-Melody scetch to upload.
Simply connect it like shown on the schematic and Fritzing scetch and enjoy the melodies.
When you extract the zip to arduino files directory you can also open the fritzing file there and edit the pogram in Fritzing New Code Editor.
Merry X-Mas !!!