You blink and your kids have outgrown their clothes. Because I have to shop for new clothes so frequently, I’ve made it my mission to find an easy way to shop for top-notch quality at rock-bottom prices. Find out how I bought 20 pieces of clothing for my son for under a hundred bucks.

My secret to saving on kids clothes is shopping online at Thredup.com and Swap.com. They’re online consignment shops that sell gently worn clothes, and many of the items they sell are brand new with tags still on them.

What I love is that you don’t have to rummage through racks and racks of clothes in a store. All it takes to narrow down what you’re looking for is the click of a mouse. You choose what type of clothing you want, as well as your condition requirement: new, excellent, or good.

On Thredup.com, there’s a 40% off promotion code for your first purchase. To get this deal, all you need to do is sign up, and they’ll email you the discount so you can add it to your cart when you’re ready to check out. With the extra savings, the clothes in my cart ended up costing about $5 a piece, for brand names like Puma, Janie and Jack, and J.Crew – which often run about $30-$40 per item. For all 20 pieces of clothing, I only spent $96.80.

When you receive your package, you’ll find the items thoughtfully packaged—clean and neatly folded, as if you’ve gotten a present from a friend.

Swap.com’s selection is even larger—with toys, baby gear, women’s and maternity clothes, and more. They receive about 250 new boxes each day and have prices that are generally lower than Thredup. It does take some patience to sort through the amount of inventory they have, but it beats sorting through clothes in store.

For Yahoo shoppers, use the promocode “YAHOOSWAP” to get free shipping.

Another way to stretch your dollar is to send in your clothes to sell. But they’re very picky about what they’ll accept so don’t be surprised if some of your items are rejected. As a buyer, it feels good to know that they’re selective, but it can be a frustrating experience for a seller. Don’t expect to make a lot of money: it’s an eco-friendly way to get more space in your closet and get a little something back in your wallet.

And that’s more money for your family. What’s your secret to saving on kids clothes? Tweet me your tips @jeanie531 or in the comments below.

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