One of the most important influence that we can have on our kids is how we nature them.  The establishment of a positive environment that will nature their abilities is one of that most important things that we can do to help them develop.  Sure we can run out and buy special toys, music and games to stimulate their development but you have to remember that it is more important to read to them every day to encourage the development of their brain.  Research has shown that children who are read to by their parents have a larger vocabulary than other children.  Reading also provides them with new perspectives about the world.  It also encourages them to read on their own.  Just read and continue to read to your kids.  Its very important in their development.