I agree, a Matzo cover. Most I've seen are round, but any shape would be appreciated. Google Matzo Cover to see examples of what's out there. Traditional "Jewish" colors are blue & white, after the flag of Israel. Have a wonderful time at the Sedar! Lucky you, my family is too far away for me to join them at the holiday.
P.S. Make sure any food or drink you may want to bring states "Kosher for Passover" on it.