Hand-decorate a table runner with penned expressions of thanks.
For fabric pens, we recommend the nontoxic Marvy brand, which is permanent, water and chlorine resistant, and dries instantly.
The week before Thanksgiving, set the table runner and markers in a central location and encourage everyone to write a fond memory or sentiment from the current year (younger kids can draw pictures to depict their message). Perhaps it's a birth or marriage, a sports accomplishment or even bringing home a new puppy. Be sure to include the date.
After displaying your handiwork at the big feast, store the table runner away until the same time next year when everyone can add a new round of thanks.