The term 'WHAT BALLERINAS DANCE ON' can be answered with the word 'TIPTOE', which is a 6 letter word. Ballerinas are dancers who specialize in classical ballet, and they often perform on their toes, or TIPTOE. This requires a great deal of strength and skill, as well as the use of special shoes that help them to balance and stay on their toes. Tiptoeing is an essential part of a ballerina's performance, and it is a skill that must be mastered in order to become a successful dancer.