Ummm... the power button works for me.
You see, one of the real beauty elements of a console is that you don't have to exit what you are doing to shut down the console. On a PC, they make you jump through hoops to shut down your computer, because you have a chance of corrupting the file system if you don't. On a console, there is no file system to worry about, except on the memory card. So as long as you don't turn off your console while saving, you should be ok.
As for learning the basics before giving the game to your kids? I wouldn't really worry about that either. If they are ordinary kids, they would probably learn the basics quicker than you. (no offense).