Last Halloween your toddler dressed up as a monkey, but this year he wants to be a pirate — and even if he wanted to be a monkey again, he doesn’t fit in last year’s costume anyway! Even so, you probably hate the idea of buying a Halloween costume every October, only for it to never be worn again. Here’s an idea you will love: Costume swapping. Green Halloween and KIWI magazine are teaming up this year to launch the very first National Costume Swap Day on October 9. Swaps, big and small, will be held across the country so kids and adults can trade in their lightly used costumes from Halloweens past for a costume that’s new-to-them, saving money and the planet all at the same time.

Swapping costumes means that fewer costumes need to be produced by manufacturers each year. In turn, fewer resources are needed to make those costumes, less packaging is required, fewer costumes need to be transported from other countries or to your local store, and less waste will be produced since many consumers trash their Halloween costumes once the fun is over.

According to Green Halloween, if just half of the children who celebrate Halloween swapped costumes instead of choosing new ones, annual landfill waste would be reduced by 6,250 tons, which is equivalent to the weight of 2,500 midsize cars! And just think what kind of difference we could make if adults and more children got involved.

Lots of costume swaps are already scheduled around the country on and around October 9, including events in New York City, Los Angeles, Seattle, and Chicago. If your city isn’t listed, you can try searching for Halloween costumes on an online swap site like Rehash or Swap Style. Or, better yet, you can host your own costume swap. Whether you simply want to get together all the families in your building or neighborhood, or if you want to plan a bigger citywide event, Green Halloween has easy tips for creating an eek-o-fabulous costume swapping event and a registration section to help others find out about your swap.

+ National Costume Swap Day

+ Green Halloween

+ KIWI magazine

Lead image © juhansonin