Hi, I'm Jared. I bought an original Otamatone on a whim and immediately fell in love with the joyful little instrument. I was surprised that there weren't any other sheet music options specifically for the Otamatone other than the "Ode to Joy" version included directly in the box with the instrument. That's why I made Otamatunes, to share easy sheet music for the original Otamatone that you can print yourself at home! There are only a couple songs available so far, but I'll be adding more sheet music over time.