Going through Marie Kondo's process was amazing for me. I've tried so many times to get organized, and her book seemed to address the exact reasons why each of my previous attempts has failed. And it really, really, worked.
I would encourage anyone trying it to actually give the stupid sounding stuff in it a try. For instance, I found with items I was having a hard time letting go of, verbally thanking them for their service and saying goodbye, as she suggests, actually worked. Somehow it seems to satisfy whatever part of your brain is reticent to part with a particular thing.
Or—if your momento is a physical picture (e.g. an old photo album, or a scrapbook, or childhood drawings left on the fridge for years)—try digitizing it.
That's a really great idea for kids drawings. I'll always keep a select few special ones, but any parent knows you'll end up with an art gallery if you keep everything. Making a digital art gallery of that stuff is a really good approach to letting go.
I wouldn't go that far. No digital gallery will keep the physicality of your kids' art and you'll really cherish that part when they're older, and throwing away what your kid makes is really going to squash any interest in making more of it.
I would encourage anyone trying it to actually give the stupid sounding stuff in it a try. For instance, I found with items I was having a hard time letting go of, verbally thanking them for their service and saying goodbye, as she suggests, actually worked. Somehow it seems to satisfy whatever part of your brain is reticent to part with a particular thing.