The difference between big balls and small balls in piano, chess, painting and calligraphy

Qin refers to musical instruments, chess refers to Go, books refers to calligraphy, and painting refers to painting. Then big balls refer to ball games, such as basketball, football and volleyball, and small balls refer to smaller balls, such as table tennis and badminton. This is the difference between piano, chess, calligraphy and painting and big balls and small balls.