A therapeutic training device comprises a shallow housing of a specific shape with a quadratic top surface, a quadratic bottom surface and four thin rectangular side surfaces. The housing comprises an upwardly open cavity in the top surface and a flexible and transparent cover which encloses the cavity at least partially. The flexible and transparent cover has a size in the range between the size of a human fist and the size of a human foot, and defines a central part. The housing further comprises a force sensor placed inside the cavity communicates with the central part. The force sensor measures the force applied on the flexible and transparent cover and generates a response signal. The housing further comprises a light source placed inside the cavity, the light source being visible through the flexible and transparent cover, and a central processor placed inside the housing, which activates the light sources in accordance with a specific software and evaluates the response signal from the force sensor in accordance with the specific software. A plurality of communication means is located on the side surfaces and is controlled by the central processor and communicates with adjacent devices.