The Cat Thumb Piano in engraved using our Georgia Pine. It is simple to learn for all! Follow the numbers from the song book with the corresponding numbers on your thumb piano. Instructional songbook is included with each instrument. We offer 3 different Tunings, High Diatonic (standard), Low Diatonic and Pentatonic. Weight: 8 oz. Dimension: 0.500" × 0.333" × 0.167".