Activities focused on knowing the different sounds of letters helps children sound out written words. Consider expanding this activity to include numbers as well.
With your child, go on a hunt for things in your house that start with a letter. You can choose to play with items in specific rooms. For example, if you start with the letter "a" and are playing in the kitchen, you can find an apple, an apron and an avocado. Work your way through the alphabet until you get to "z".