If I were to pick 3, I would use #2, #4, and #6, with #2 between the others. You have the two children (4, 6) and the loving emotion expressed by Dad (#2).
I was thinking of framing these 3 for my husband for his birthday...what do you guys think? #1 #2 #3 Or I could do these 3? #4 #5 #6 It is so hard to get good pics of my own kiddos :rolleyes