In my short time on this planet I have lost a number of family members and friends. One of the most touching and comforting things is when I have received a small object that the loved one used in their everyday lives. From my grandmother I got a paper weight, from one grandfather I got a pocket watch, the other grandfather I got some hand tools. While I do not use these objects every day, when I do use them I am reminded of when I saw them used by my relatives and it triggers fond memories. I would suggest that each of your children get something they enjoy of your wife’s when she passes. Keep the photos and video for later in your children’s lives. I know looking at photos and videos right after someone has died can have a strange affect on people. Another thing you might want to do is write down what hobbies, music interests and other seeming unimportant things your wife likes. I was interested to find out my uncle enjoyed listen to The Doors and had a motorcycle and that my one grandfather had a small winery. Have your wife write stories about the kids, her meeting you, her time in high school or college, and other funny or important events in her life so they can be passed on. Most important, don’t force any of this on the kids, later when things don’t hurt as much they will want to know more about her. Share the photos and stories of her with them then.