Experience this mesmerizing xylophone in the forest ...

A Japanese advertising agency decided to think big to attract the attention of cell phone customers --  so they built a giant xylophone in the middle of a forest!

The instrument is made entirely of wood, and what makes it remarkable is not only the size but also the fact that there is no musician playing this instrument!

There is only one small ball, also made of wood, that continuously rolls for more than a kilometer, producing a soothing sound that recalls Bach's Sonata No.147.

The reason for all this? To advertise cell phone ringtones!