Cute kids,
#1 seems just like a snapshot to me...When your outside try not using flash....
open shade is the most gorgeous light and in my opinion does not need flash...shoting at a lower aperature....f/3.5 maybe?
#2
This one is my favorite...composistion is nice...But it is a little underexposed and her eyes are quite dark...would you be ok with me giving this one a quick edit and putting it back on here?
#3 the light is super distracting....blown out and his eyes are in the dark...
Overall though keep going in the direction of #2 ;-)