This is a great idea from the CLU Campaign to make Halloween accessible to children who can't eat candy. Whether due to diet restrictions, allergies or feeding difficulties, some kids just can't partake of sweet candies and that might make trick-or-treating a little less fun for them.
So here comes the Trick-or-Treat Project to the rescue! The idea is to encourage houses to provide non-candy treats to trick-or-treaters (I suppose they could also offer non-candy tricks, but let's stick to the treats). This can be in the form of healthier, sugar-free treats and small toys. And now everyone can enjoy what they get in their trick-or-treat bags!
To make this work, the Trick-or-Treat Project asks that you print out one of their pdf decals to place in your window so trick-or-treaters know that you are offering non-candy substitutes. To make this really work, you can also register your home as an inclusive spot on their website (but that's optional). If you're looking for participating homes, you can check out their CLU Map to see if there are any registered near you.
Visit the Trick-or-Treat Project for more details and Happy Halloween!