1. An educational device provided in planar generally rectangular form, comprising: a first planar support member having a front face and a back face; a display window constituted by a rectangular cut-away in the front face of the planar support member; a plurality of different visually-recognizable vowel symbols provided adjacent the periphery of a first rotatable member mounted to said support member, one of which vowel symbols may be displayed at the display window by rotation of said first rotatable member, each different vowel symbol comprising single vowel letter/or multiple vowel letters for a word to be displayed in the display window and being coloured or displayed on a coloured background in a colour the pronunciation of the vowel of which has a phonetic relationship with the desired pronunciation of the respective vowel symbol; and a plurality of additional alphabetical symbols provided adjacent the periphery of at least second and third rotatable members mounted to said support member, which additional alphabetical symbols may be displayed at the display window by rotation of said second and/or third rotatable members to form a word with the displayed vowel symbol at the display window; said rotatable members being mounted to said support member with their axes forming a triangle with a peripheral portion of said first rotatable member protruding from one longitudinal edge of said support member and with a peripheral portion of each of said second and third rotatable members protruding from another longitudinal edge of said support member to enable rotation of said rotatable members to be effected by manual manipulation of said protruding peripheral portions of said rotatable members.
6. The device of claim 1 wherein said vowel symbols comprise only long vowel sounds.