We’ve said it before swapping is the new shopping. This Earth Day  sign up for Thredup.com, a company that let’s mothers swap their kids’ clothing, to get a deal.

Thredup.com was founded Earth Day 2010 and to commemorate their anniversary they are giving anyone that signs up a $13.95 credit to begin swapping. That means you’ll only pay $2 for a box of pre-loved clothes!

Listings by other mothers include toys, books and outgrown kids clothes. To learn more about how it works, check out Bargain Babe’s post about the swapping website.

Signing up is easy. You can use your Facebook or sign-up directly with the site. Then you can browse the listings and post your own items. Payments are done through PayPal, so you don’t need to share your credit card info with ThredUp.

Based on an EPA report and ThredUp report, swapping kids gear can lighten your overall eco-footprint by 5 percent on average.

This swapping community does not only make it easier to go green but to declutter your home. You can send boxes of items your kids no longer use.

Once someone picks your box of listed items, you can mail them for free. If you can’t decide whether to join, try their savings calculator, where you can input basic information like the number of children you have, their ages and the percent of kids clothing that you buy and it will give you the dollar amount you are savings.