23. The teaching aid of claim 21, wherein the second set of displaceable tiles has some tiles which are individually coloured to indicate a phonetic vowel of any language and additional individually coloured alphabet tiles are provided for non-standard alphabet sounds.
23. The teaching aid of claim 21, wherein the second set of displaceable tiles has some tiles which are individually coloured to indicate a phonetic vowel of any language and additional individually coloured alphabet tiles are provided for non-standard alphabet sounds. 24. The teaching aid of claim 23, wherein the additional coloured laphabet tiles are provided for sound vairations of the same consonant letter.