Abstract: A step-on type tone scale play device has a flexible mat within which is arranged a plurality of flexible switch elements in accordance with a tone scale and is adapted to produce corresponding music sounds when marks configured on the surface of a mat to indicate the position of each switch element are stepped on.The device is very easy to keep and carry, and convenient to display or perform as compared to the conventional device, as the mat is light and capable of folding or rolling into a compact form.

Abstract: A device for studying music concepts, in which, a teaching sheet having a musical staff entered therein is set under a transparent plate having transparent conductive films disposed corresponding to the lines and inter-line spaces of said staff of said teaching sheet, and by teaching a specific scale note of the staff with a conductive contact bar, a corresponding sound may be produced. Thus music pupils learn through their eyes and ears by means of this device.By using this device in combination with an overhead projector, group studies may be made effectively in a school room.Further, the teaching sheet and transparent plate may have certain patterns of musical instruments for studying playing positions.