William is three years old. William is not silly. You can introduce the concepts of capital and lower-case letters after he is pretty comfortable with these early sentences. Make extra versions of the capitalized words with lowercase letters. Tell him new sentences always start with capital letters, to remind people the sentence is starting now.
Names also start with capitals, because they're special.
Help him decide which version of the word to use in each sentence. You can play with these flashcards until there are just too many cards to work with. By this time, you will be ready to move on to books. This page has been visited times.