(The day after the summer solstice, Isabella walks into Phineas and Ferb's yard.) Isabella: Hey Phineas. Phineas: Hey Isabella. Isabella: Whatcha doin'? Phineas: Well, do you remember when we went to Paris during our trip around the world? Isabella: [:( How could I forget? Phineas: Well, it inspired me to build this: Ferb let 'er rip! (Ferb flips a switch and a Paris-like scene appears in their backyard.) Isabella: :0 You built Paris itself?! Phineas: Yeah, whaddya think? Isabella: :)... I think it's your best idea yet.