The spelling train / teaching Aids

It is a educational toys.
My concept of project is for blind children,but it’s common to normal children can use it.
Its shape like littel trian,there have A~Z 26 letter on its body and every letters on it
has a braille faceplate,then blind children can touch and leren.
When the letters build up be a word,ex:apple
the locomotive has a speaker,it can read the law the word.
The locomotive also has a recorder,it can record the child voice and let them listen.
By the way,the trian’s body also has magnet,can use like memo.