I have a 2 1/2 year old. And he received his vaccinations up until he was 6 months old. That's when I started doing research on vaccine dangers and realized it is very dangerous for these young immune systems. My cousin's son has autism from the 2 year vaccination he received. They said he was fine until he received the 2 year immunizations. Then he went down hill from there. I am certain the reason he has autism is because of the MMR vaccine. My son will not receive the MMR vaccine, because I believe from all I've read it is unsafe. My son is very smart as well as yours. He knows how to write his abc's now at age 2 1/2. He started saying his abc when he was about 18 months. He even says his abc's backwards now, which I can't even do. He is very intelligent and loves to learn. Maybe the fact that our kids don't have all the mercury that most kids receive from vaccines, might be the reason why they are so intelligent.