One thing that will be very important to your kids are the family photos. Your instinct might be that you want them out of your house and out of your life, but these are important items for your kids.
Photo album and memories
For one thing, it allows them to hang onto the fact that you were a couple, and a family, at one point. Your children likely have some very happy memories that can be relived through those photos. Don’t toss them, instead save them for your kids. You don’t need to leave framed family photos scattered through the house or a photo album on the coffee table (or digital file on the desktop of your computer), but you should try to save many of them for your kids. They will want to look at them from time to time, and that’s ok. It’s healthy for them to want some visual cues to help them process what happened. You may not want to look at the photos with them and that’s ok too. Give some brief feedback and make yourself busy with something else. Plan to pack those photos up and move them out of the house when your kids move out.