When my bf's niece went to DR to visit her grandparents her mom went with her and stayed there for a week then came back, the niece stayed there the whole summer then her grandparents brought her here. She is also 6 yrs old. I think it's too young to travel alone. When I was little I would go to
PR all the time but with my older brother with me and the flight attendants would take care of us but my brother was always mature and never scared.