Sesame Street® 1st Birthday Dinner Plates. Elmo and his friends will help make your boy or girl's first birthday party an extra special celebration! Featuring Sesame Street's favorite characters, these Elmo, Big Bird and Cookie Monster 1st Birthday Dinner Plates are perfect for your party tables and make cleanup simple. Remember to order extra Sesame Street® 1st Birthday Dinner Plates for serving snacks, too! Paper. (18 pcs. per set) 10 1/4" Sesame Workshop ©, Sesame Street © and associated characters, trademarks and design elements are owned and licensed by Sesame Workshop. © 2007 Sesame Workshop. All Rights Reserved.