The balloons are crafted of durable and strong latex; banners are made of sturdy heavy duty card stock paper and can easily be reused for multiple parties. The banners and balloons are extremely easy to assemble, it would be a happy family craft to assemble with your kids and decorate the party. , , PACKAGE INCLUDES: 1 Pc Construction Theme Happy Birthday Banner, 11 Pcs Cupcake cake topper, 3 Pc Construction Theme Mylar Foil Balloons, 3Pcs Pom Pom (Yellow, Black, and Orange), 24 Pcs Latex balloons (Yellow, Black, and Orange), 15 Pcs Tassel banner (Yellow, Black, and Orange)