For a birthday party have the guests write a memory for the birthday girl. We could just have a secret box in the house or...better, yet, we could email them to a volunteer who will print them and slide them into clear pages in a 3 ring binder or better, a scrapbook from a craft store could be used and glue the printed pages in, in some artsy manner. Maybe like we did for Grandpa.
Awesome birthday party photo prop. We blew up photos of the birthday girl over the last thirty years, cut them out and glued them to a stick for photo props for the guests. We got the most hilarious photos.