#1 I prefer to use photofloods instead of electronic flash systems, because I can use the auto exposure mode of my digital camera with only slight modifications.  I do have to make sure that the camera is held still by using a tripod and I ask the subject to hold it while I actually take the picture.  If you are trying to shoot kids probably electronic flash would be better,  kids never hold still. 

 #2 Use a main light to create your image.  Set it so that if the person is looking directly at the camera their nose casts a triangle type of shadow on their cheek.  Usually this means that the light is to one side of the camera and slightly above it.  Then you put your second light level with the camera on the other side and slightly further back from the subject than your main light.  This will FILL in the shadows while still giving you a 3 Dimensional effect. 

 #3 Set the white balance to match the color of the light you are using.  Tungsten, daylight, or custom.

 #4 Set the macro mode if closer than 3 feet.

 #5 Adjust the +/- exposure settings until you find the right exposure when you open the picture up in whatever picture program you are using. 

Have Fun!  KIS---Keep It Simple