Keep their toys in a specific part of the house.
Ah, the KonMari method: the Japanese organizational system that's taken the internet and messy closets by storm that you've probably been dying to try but never found the time. The decluttering strategy, which is described in The Life-Changing Magic of Tidying Up: The Japanese Art of Decluttering and Organizing by Marie Kondo, can even apply to your little one's nursery, bedroom, or playroom with a few tweaks from the adult version.
First and foremost, Marie suggests dedicating a big block of time — even a few days, depending on the space — to attacking the mess. The next step requires a little help from your mini me as well as some hard and long thinking. Your mission? To get rid of anything and everything that doesn't "spark joy" in your kiddos. While that may be easier said than done, getting rid of toys, books, and games your children don't play with anymore is proven to give you a lot more peace of mind. The last, and often the hardest, step is to actually find a permanent home for the things you plan to keep. Per Marie's instructions, you organize by category, rather than by room.
Thinking about doing away with all that excess stuff for good when it comes to your kid's spaces? Follow these steps to rid yourself of clutter once and for all.