Mario's Early Years: Fun with Letters is an educational game for the SNES and MS-DOS, teaching the basics of English to children. It released on MS-DOS in 1993 and SNES in 1994. It was the predecessor to Mario's Early Years: Fun with Numbers.
The player plays as either Mario or Peach though the differences are merely cosmetic and then takes part in word-based games via choosing a world. Different worlds have different games though they all focus on using the Mouse to select the word that satisfies the condition.