29. The computer system of claim 26 , wherein the interactive feedback mechanism has superimposed thereon an animated display of an ideal gesture so that a difference between the practice gesture currently being performed and the ideal gesture can be perceived.
29. The computer system of claim 26 , wherein the interactive feedback mechanism has superimposed thereon an animated display of an ideal gesture so that a difference between the practice gesture currently being performed and the ideal gesture can be perceived. 30. The computer system of claim 29 wherein the computer system is selected from the group consisting of a desktop computer, a tablet computer, and a notebook computer.