Party Decorations in Thanksgiving Party Supplies. Buy products such as Pumpkin Harvest Fall Window Cling Sheet, themed Thanksgiving decorations and party supplies make it easy to dress the table and set the holiday mood. Choose a traditional Thanksgiving decorating theme for the adult table, a fun turkey design for the kids' table, or mix and match any pattern of Thanksgiving party supplies with chargers, platters, and serving bowls in elegant fall colors.