Can you make your grandchildren smarter?

Can you turn a child with an average intelligence into a child with an above average IQ? WELL, let's see! Research has shown that normal children deprived of human touch and mental stimulation suffer a type of retardation brought about by their environment. Also, children deprived of good nutrition will have not only stunted growth put also a stunted IQ. So can good nutrition and the right kind of play, and mental stimulation have the opposite affect on kids and make them smarter?
   If it is possible to give my grandchildren a boost up while spending time with them, then I am going to do it. BUT I  am not talking about anything that is not appropriate for their current level of development. Also, the sooner you start doing enriching activities with your grand kids the better the results.
 With all that said here is
TIP # 1 Talk, Talk, Talk! Tell them how to cook an egg and make the bed. Tell them about when you were little. Tell them the name of the birds in the yard and the fruit and vegetables at the store. Just talk to them. Even when they don't talk back or seem to understand anything you are saying, because research has shown that one thing that gives children from higher income families an edge over lower income families is the quantity and quality of language exchanged between the adults and the children in the family. So talk is cheep, well actually free, and it is one of the most important things you can do with your grand kids. By the way if you don't know the names of the birds in the yard or what kind of dog your neighbor's new puppy is, then make it a point to find out so you can tell your grand kids. As a teacher, I think it is ridiculous that at 9 years old most kids think every bird that is blue is a blue bird and every bird that is red is a red bird. Around here what they see is usually a blue jay and a cardinal.They obviously don't have grandparents like us to set them  straight!