3D Piano Keys B to C Major 5 Minor Key 3x6 Music Papercraft 3D Piano Keys B through C Major Keys, 5 Minor Keys, 3x6 Inch Folding Papercraft, also for card making paper card stock craftGive this to the musician or music lover in your life! Attach to a card stock 5x7" card base, and instead of an envelope, use a box slightly bigger than 5x7" Make your own 3D piano keys, and use as a visual to learn how to play piano or keyboards!Upper group are the dark brown minor keys: C# (# means sharp) / D min