I believe that kids are never too young to start learning!
Don't wait until they get to kindergarten to let the teachers teach them to read! I'm sure you wouldn't do that! But you don't even have to wait till they're 4, or even 3.
I started teaching my daughter at the ripe old age of 2 and she is a very avid reader! She has an insatiable appetite for learning and reading!
She was only 2 yrs. old when I took her to the mall and she looked up at the letters on the SEARS store and began yelling out the letters to me. A woman passing buy was absolutely flabbergasted at seeing this tiny little 2 yr. old so smart! She also writes a blog and has written many articles for online magazines.
I believe our kids learn better the younger they are! I believe they can take in much more at a much younger age than most of us give them credit for.
TRY IT! Don't procrastinate! You could be wasting a lot of precious, valuable time with your child and you might be very surprised at the outcome!
Start working on that genius child!