Phineas and Ferb woke up in the morning. Phineas reminded Ferb that it's Phineas' birthday, which makes him excited. Ferb points to the calendar and Phineas realizes it's Isabella's Birthday as well. Phineas decides to throw a huge party for him and Isabella, mostly Isabella. Phineas notices the absence of Perry. Perry opens up the TV and jumps into a slide. Major Monogram tells Perry that Doofenshmirtz has been making a Antibirthdayinator. Perry remembers the birthday and dashes out. Phineas is checking off his shipment of balloons, snappers, tables, chairs, and tablecloths. The shipping guy asks Phineas if he is to young to use all this stuff, and Phineas is surprised and says "No, no I'm not". Phineas realizes he has to keep Isabella away while they are working. Phineas informs the Fire