"Let's Go Mets!" Celebrate with the Mets and Mr. Met as the start off their season at Citi Field. If you are a fan of Willie Mays and Nolan Ryan, you are going to be a huge fan of these New York Mets party supplies. Whether you are having a birthday, tailgating or victory party, Birthday Direct is here to help you out. Be sure to take advantage of our FREE shipping offer! Save 50-60% off select items.