Hi J.,
I just took a pre-reading class for 4 and 5 yo's with my son. It worked so well, my 5 yo is now "reading" (so cute), and his little brother (3) is also "reading" to himself.
Pick books that have lots of rhyming, or predictable, repetitive phrases ("Cat in the Hat;" "Caps for Sale;" "We're Going on a Bear Hunt;" etc.) whatever you already have on the shelves.
Read them to your girl, then tell her to read the book to you. At this point, you still read most of the words, but let her fill in the rhyming words or repetitive phrases (you can coach her through this until she starts to learn them).
She can also start "reading" to her little brother right away by telling her own version of a story by looking at the pictures.
{{how cute!!}}
t