The series is about two-step brothers who find inventive things to do on each day of their summer vacation such as building a roller coaster out of materials you would find in your everyday home like popsicle sticks, indoor plumbing, etc. Unbeknownst to them, their pet platypus, Perry, leads a double life as a secret agent. Mitchel Musso has confirmed he will be doing the voice in a recent interview he did promoting Monster House.