I shot all of these with my Nikon D70, using a 50 mm, f:1.8 lens. I shot in Aperture priority mode, and because the lighting was not consistant, I used exposure compensation quite a bit. If you have any more detailed questions, just leave a comment and I'll do my best to answer.
Sammie and Grandpa Tim:
Cousins Mike and Beka:
Cousin Emily with her fiance Brian - (side note: Em has great taste. Brian is really into photography too - AND he shoots with a Nikon, so we totally approve - wink, wink)