Holidays are not the time to get bored! Phineas and Ferb well know how to play. They decided to build the coolest backyard roller coaster! But in order to do so, you must have a good design and the weight of hard-to-get parts. Be aware that sneak ferret wants to stick his nose in not his business... Moment, and where is wonderful, Mr. Pepe Platypus? Again, does a secret task! Fearless Agent P. fights against cruel doctor Doofenshmirtz. You have to help him! And, of course, remember about the roller coaster. Fun has begun!