A fish-shaped figure which represents thumb movement in piano playing

The hard texture of the thumb's lower muscle is similar to fish and touching the fish's body helps students to remember and develop the hard thumb muscle. This toy fish is designed for tactical purposes for its similar resilience to the thumb muscle. Thumb movement is difficult to understand because of its anatomical structure and movement. Watching a fish moving smoothly in water and its storyline in Dr. Song’s Icon Gifts Vol.4, students are able to use their thumbs very efficiently.