Updated frequently, so come back. We don't know. We don't know. Our 2 year-old is starting to name letters and make letter sounds. We don't know.
Every child is so different with their own unique style.
What worked magic in one is a complete bomb with another. Some children teach themselves to read, others not only can't read but don't want to read. Read out loud to them. Read to find out as much as you can about teaching a child to read. Read as an example to your children, show them what a wonderful tool and a pleasure reading can be.