I wrote my post from the POV of a teacher. I currently teach kindergarten, I have a child in my class who was taught to read before she started school- great you might think! NO!! because although she can read she cannot recognise rhyming words, she can't think for herself about what to do in any situation ie can't find the correct book box, can't find her scissor etc she hasn't even the skills to put up her hand and ask simple questions but hey she can read!

I agree don't deny him if he asks but there is so much more about learning than just letters and numbers. Can he find his own bag at preschool? can he ask someone else to play with him? Can he express his needs to other adults other than family? Can he tell what rhymes with what?

Children are young for such a short time please let your kids play in the mud, paint pictures, run around like lunatics and have FUN while they still can, they have many many years of schooling ahead of them for work.