There’s no good reason for your son to be able to read before he starts school. He’ll learn in school. If he’s interested and wants to learn, then by all means go for it. If he shows an interest in writing letters, asks how words are spelled, starts playing around with rhyming sounds, and asks you to tell him what signs say as you’re driving in the car, take advantage of that interest and answer his questions.
Read fun, silly books to him. Read him books about things he’s interested in, whether that means you’re reading about dinosaurs or Power Rangers. When you’re reading to him, ask what he thinks will happen next in the story. Spend some time drawing and coloring with him, and ask him to tell you stories about his drawings. My four year old is currently obsessed with making his own books. He’ll do a bunch of different drawings, staple the pages together, and dictate a story for me to write on the pages. Besides being great for his creativity, it’s highly entertaining for me to see what he comes up with! Read these home-made books to him.
When your son starts school, if he can say the ABC’s, recognize most of the letters and numbers, and count to at least ten, he’s ready to learn to read. My kids have always had to keep a “reading log” for school, which was easy because we spend time reading each day anyway. Get into the habit now, make it fun by letting your son pick the books, and turn the TV off!
Even if your son won’t sit with you while you read to him, read out loud anyway. Let him color or play with toys while you read, and eventually he’ll come over to look at the pictures or see what’s going on in the book. Make up stories (or tell him stories you already know) while you’re in the car, giving him a bath, or eating breakfast together. If he’s the starring character in the story, he’ll love it all the more!
Have fun, talk to him a lot, take him places and then find books based on what he liked at those places. If you go to a museum and he likes the dinosaur bones best, go to the library and read dinosaur books. If you go to a park to play and he sees some flowers, bugs, or animals he likes, find books about those things. Besides helping him learn to love books and reading, you’ll be giving him the gift of your time and attention, something the television can never do.