How many kids go off to college, only to come home for the holidays to find their mother "cleaned" their room, tossed Farah Fawcett's wall art, and most of their really good stuff? My children's grandfather went to his grave bemoaning the treasures his mother tossed while he was defending his country. It ain't fair.
Boys of a certain age, were great collectors of the Wes Wilson designed Fillmore Auditorium posters in the mid '60's. I lived 2000 miles from San Francisco, and had a bunch. Every head shop in the US sold them for a buck or so. Tickets to the shows were less than $5. Ticketmaster wasn't even a dream. Gone, every last one, without even get a chance to say goodbye.
Today, original posters will sell for thousands. Copies near $50.
So mommas, a little respect. Clean their space if you must, but box it up, save it with the same love it was collected. Don't toss a lifetimes treasures. No toy soldiers, no toy cars, bikes, buttons or medals, especially stuff you don't like. Do and your kids will hate you.