4. An educational device as claimed in claim 3 comprising tactile-visual aids showing the correspondence between said indicia of a ring and said specific finger of said specific hand to be wearing said ring.
4. An educational device as claimed in claim 3 comprising tactile-visual aids showing the correspondence between said indicia of a ring and said specific finger of said specific hand to be wearing said ring. 5. An educational device as claimed in claim 4 wherein said tactile-visual aids comprise representations of said fingers on said rings to be worn by said specified fingers.