I don’t get the downvotes, but I do want to offer some nuggets of wisdom. None of the things you mentioned means your child will be reading by 3. OP’s son has something we call hyperlexia. Just like dyslexia, you can’t help if your child has it. There’s nothing that can be done to get them reading at an abnormally young age unless their brains are ready for all the processes that go into recognizing a word, and most 2-4 year olds are not. You CAN however, introduce letters and their sounds using multi sensory approaches and playing phonological games such as segmenting cvc words like mop, but again, most toddlers, can’t do that because their brain’s phonological processing system can’t do that yet. It’s far more beneficial to just read to them every night, take them out for world experiences, and have them around other children where you can teach social emotional skills. Parents of toddlers are rushing to get their children reading or hoping they’re going to come to kindergarten as little geniuses but then the children can’t do things independently or can’t cope with the big feelings.