Thumb Piano

FIG. 1 is a front, right and bottom perspective view of a thumb piano showing my new design;

FIG. 2 is a rear, left and top perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged partial view of FIG. 1 ; and,

FIG. 10 is an enlarged partial view of FIG. 5 .

The broken lines in the figures illustrate portions of the thumb piano that form no part of the claimed design.