Are they ours?

I pulled out a few of our baby/kid pictures to compare them to Tristyn and Mason. What do you think--any resemblance? I think you can click on each collage to view them larger.

Top: Tristyn 3 months, Steph (age unknown, but probably about 3 mos also).

Bottom: Steph (age unknown, but probably approx 4 months), Tristyn 3 mos

Dan is the old fashioned pinkish photo. Mason is about 2 1/2 in all of the photos. I'm not sure how old Dan is in his, but I assume it's around 3 or 4. Other than the full rust-colored hair (okay, I know it's just the photo), Mason looks a lot like him.