I think my comments was misleading. I do believe children should learn what they are ready to learn at their level not their age or grade.

I wouldn't do the baby can read because it seems like it's better to let the child lead. This seems like it pushes a child into a unnatural direction.

When ever my children have show interest in learning things I supported that to the best of my abilities. It seems like there are other things that I would prefer to do with a child at this age.