Get a 'Santa sleigh" dress some guys up as mechanic elves and work on the sleigh to get ready for the delivery night perhaps a big calendar to show Dec 24. A giant RO ticket, tune up Santa's sleigh, fix dent in side from grazing star on practice run by Clyde, etc.
Questions
Here are questions related to this page. Click "Ask a Question" if you have a question to ask about this topic.
You could ask the kids what they will be most thankful for this year, and have them make and hold a poster of what they tell you. Maybe the float could be dressed like an old fashioned dining room at Gran's house and the children could be sitting around the table.
Something else I'm seeing this year are Thanksgiving trees and I think it's a great way to remember what Thanksgiving is all about. The kids could wear a leaf shaped poster with their 'most thankful' written on it, and there could be a tree with construction paper leaves wired on, written with their most thankfuls.