Once they ran out of things to say, we showed them this short video-
We also showed them this video but it was a little too long and the younger girls lost interest. It might work well for an older or smaller group.
Here is our finished board-
We spent the remainder of the time making thankful books. Each girl got three brown paper bags then folded them in half. We cut small slits (you could also use a hole punch) then fed twine or ribbon through to hold it in place. The girls then had free reign to decorate it any way they wanted. They all left with the challenge to write things they are thankful for each day between the activity and Thanksgiving.
Here are some of the books they made.