Remote Support Software

I need a little advice. I am looking for a very small remote support software package. It will only be for my personal use in assisting my brother who lives in another state. Our goal is mainly to allow me to help him from time to time. It is strange I know but he has his first computer and knows nothing about them and gets stuck a lot setting up different things and moving around. We just want a small setup where I can go in remotely and help him when he needs it. Nothing major. Does anyone have any suggestions to a program that would do this and not cost a fortune? Thanks in advance for the help.