Okay, we admit it, these 11-year-old twin girls are adulting better than we are!

No, seriously, young organizing pros Marin and Ellie don't just *like* keeping their rooms neat. They LOVE it.

(Watch how passionate they are in the video above!)

Luckily, they're shaing their wisdom with us — and their tip for weeding out clothes that don't fit anymore is so simple, but SO smart.

RELATED: Double-Duty Organizing: How To Use Stuff You Already Have To Get Control Of Your Chaos

(Moms of growing kids and tweens, you're going to LOVE this.)

Instead of hanging them back in their closet, the middle schoolers toss items that they've grown out of into a bin. This way, they're making room for new items in the moment, rather than forcing themselves to rummage through a jam-packed closet later!

Then, periodically, the girls sift through and either donate the bin full of gently used clothing or hand them down to younger relatives.

RELATED: This GENIUS Wardrobe Hanger Trick Will Help You Weed Out the Clothes You Don't Wear

The best part is that you do a little at a time, in the moment (when you notice something doesn't fit). So, the dreaded "purging your closet" work never piles up! And voila! An edited closet… always.

(Adults, tell the truth: you're stealing this idea, too… right?)