My wife and I did DC and Boston with our 13 year old grand daughter in July of 12 and our two 13 year old grandsons in June of 14. Soooo much better with grandkids than with your own kids. They actually like being with you
As kids enter the "Tweens," their parents become complete dumbshits who know NOTHING! This usually lasts until their early 20s and are hopefully out on their own. The smarter kids realize their mistake sooner.