That's lovely... rocks are lovely and seem to be a favorite with all ages... I even paint them, as a creative outlet.
We created a "Good Things" box at our house which is used by three generations now... from us down through the grandkids. It's like a mailbox, and then we have sheets of brightly colored paper on which you can write down something that was "a good thing" and put it in the box. On the 1st of January, we empty the box and read the good things from the previous year as a family event... in place of making New Year's resolutions.
Hi denmarkguy, what a delightful tradition your family has! It sounds like a really nice way to bring the whole family together to celebrate the good things in life.