What do you get when you combine a 17-month-old’s big blue toddler eyes with a head full of adorably blonde stand-straight-out-of-your-head hair? A uniquely darling image and a guaranteed smile. Katelyn and Caleb Samples, both 33, from Roswell, Georgia, are parents to two young boys. The youngest, Locklan, has a full head of “uncombable hair,”…