Remotely control Mac without IP address?

Hi, my parents just recently bought a macbook and they have personally appointed me as tech support lol.

I was wondering if there was a way to remotely access and control their Mac from my PC without knowing the IP address, since most of the tutorials i have read required you to enter the IP. Is there any way I could just turn on my computer, open a program, and control their macbook without much interference from them? Thanks!

-Julie

There are many products to do that.

I personally favour a free logmein account.

It's a small install on thier Mac and then you can access without an IP address anywhere you have an internet connection.

I use it for exactly the same reason .... remote tech support for family and friends