Avoid plastic costumes.
Store bought costumes that contain soft vinyl, which is similar to shower curtain material, is very likely made up of polyvinyl chloride (PVC). PVC contains dangerous chemicals and cannot be recycled.
Face paint and makeup.
Purchase organic, natural makeup for your Halloween transformation, and avoid the mercury, pthalates, parabens, and fragrances that come standard in most big-name brand makeup. It’s best to locate an organic retailer or special-order vegan makeup if you’re looking for something specific. The same suggestions apply for hair dye. Don't forget about old-fashioned techniques, like a handful of baby powder for a junior Albert Einstein, or using egg yolks to make your hair stand straight up.
Reusable trick or treat bags.
Make sure your kids use a reusable canvas bag for trick or treating rather than plastic or paper bags, both for safety and environmental reasons. Buy plain bags so that the kids can decorate them, but make sure they decorate them with non-toxic paint. Old pillowcases are another great bag for trick or treating, because you’re recycling, you can decorate them, and they can hold lots of candy.
Create an eerie atmosphere.
The paraffin in wax candles that people most often use in jack-o-lanterns releases toxic chemicals like toluene ...