Thanksgiving Wall Art - 15 Fabulous Fall Leaf Crafts for Kids..... could collect leaves as a family then decoupaged to persevere as a thanksgiving memory
DIY Step-by-Step Rose & Mum Centerpiece in a Pumpkin for Thanksgiving
Have everyone write what they're thankful for on a cloth tablecloth on Thanksgiving. Bring it out every year and add to it. Can trace the little ones handprints.