I am a big proponent of the homemade Halloween costume. For years I’ve fashioned ordinary household items, with metric tons of duct tape and safety pins, into clever costume wear to wow the candy-wielding neighbors. Sure, sometimes the costumes were cumbersome and heavy and generally uncomfortable and unsafe, but it’s tradition! And if you don’t value tradition then you’ve got no business celebrating Halloween in the first place. Or that’s what I used to tell the kids, anyway.
Eventually, kids grow older, and say to me– “Dad, can we please just buy a costume on the Internet like everyone else?” And that milestone is what I use as a rough gauge of when they’re too old to go Trick or Treating. I’m not sure if it’s really an accurate way, but it’s my way. And it helps to quell my hurt feelings.
But all this begs the general question: How old is too old for Trick or Treating? And I think there are a number of things to consider:
3 Signs your kids are too old for trick or treating- http://www.today.com/moms/3-signs-your-kids-are-too-old-trick-or-treat-8C11372803 
What's your take on trick or treating? When are kids too old to participate?