One 39 inch Phineas and Ferb SuperShape Foil Balloon. Phineas and Ferb are on a mission to wish your little one a Happy Birthday. Invite Phineas to the party! Add solid color streamers and balloons to Phineas's hands for an extra treat. Include Agent P SuperShape Foil Balloon to add more mysterious fun. Have an adventure of a time with our complete collection of Phineas and Ferb Party Supplies, coordinating decorations, and party favors.