The most difficult aspect of the Right Sizing process is deciding what to do with the treasured belongings that you can't take along with you.

It can be devastating to learn that your children don't want the things that you had hoped they would.  It is difficult to accept, but often the things we want to pass along are "our" memories, not our children's.  

Before you get to the physical disposal of items,  have a little "heart to heart" talk with yourself.

As much as you may want the younger generation to care about the things that represent the past, you can't MAKE them care......if you try (beyond a little gentle persuasion) it will lead to tension in your relationship.  

The memory is not in the item.....but rather in your heart and life experiences.  Why don't you consider taking some photos of the items.  Write a few details and memories on the back of the photo, or on a corresponding journal page and then create a memory album.  You may find that your family has a soft spot for the stories.....that they don't have for the actual stuff.