Happy Birthday Carla!

In this episode,it was Carla's Birthday and Phineas and Ferb are planning to make Carla the most greatest birthday party in Danville. Meanwhile,Perry was assigned to stop Dr.Doofenshmirtz from using the lamestbirthday-inator.

Episode Summary
The episode begins,when Carla wakes up in her bed and she suddenly saw a note left in her dresser. She picked it up and it says:

"Whatever you do,just follow

the trail of macaroni and cheese that was left

''in your doorstep. you might see some marks"''

Carla thinks that his brother is throwing a secret birthday party just for her. Meanwhile at the Flynn-Fletcher Household,Nicholas went to Phineas and ask him to help him throw a birthday party for Carla. Phineas agreed and  calls his friends to help him. All of his friends went to the backyard and Phines ordered them to buy some things that was needed to the party. Meanwhile in the O.W.C.A,Major Monogram assigned Perry to follow Doofenshmirtz and has to know what is he up to. Perry rides in his scooter and went to Doofenshmirtz's Building and he goes to the building by climbing and jumps in the window but he was caught in the trap. Doofenshmirtz welcomes Perry and explains his evil scheme. When Heinz was a little young kid,he always throw some birthday parties but it was very lame so he couldn't celebrate his birthdays. So Heinz decided to fire the "lamest birthday-inator" so that everyone could feel the pain that Heinz bare.

Back at Carla,Carla followed the trails and she went to the direction of the Googoplex Mall. She enter the mall and the trails lead to Mr.Slushy Dawg. Jeremy greet her and Carla ask that did his brother left a letter here and Jeremy replied yes and gives the letter to Carla. The letter says:

Across Maple Street

You could see a two-story house

enter that house and that person will give you

the letter.

Another Clue,Carla  follows the direction that was written in the letter. She see's the house and it was Albert's house.she press the doorbells and Irving opens it. Carla ask where is his brother and Irving replied that his brother is in the secret place and Irving gives the letter to Carla.The letter says:

Your too close to the truth

just follow the macaroni and cheese trails

Meanwhile at Perry,Perry escaped the trap and punches Doofenshmirtz and pushes the self-destruct button of the LamestBirthday-Inator. Doofenshmirtz began shouting "CURSE YOU PERRY THE PLATYPUS",Meanwhile at Carla's Party. She followed the trails and she was lead to Phineas and Ferb's house and everyone shouted "HAPPY BIRTHDAY CARLA". This makes Carla cry and everyone comforts by letting her blowing the candles and now Carla is now 20 years old.