When Phineas and Ferb discover a commemorative coin from the 1903 Danville World’s Fair, Lawrence recounts the events of the festival to them, in which steam-driven devices were introduced and a set of kids, who were very much like them, were preparing for the highly anticipated event.
Elenco: Vincent Martella , Thomas Brodie-Sangster , Ashley Tisdale , Dan Povenmire , Dee Bradley Baker , Alyson Stoner , Bobby Gaylor , Maulik Pancholy , Caroline Rhea , Richard O'Brien , Kelly Hu , Mitchel Musso , Jeff 'Swampy' Marsh , Tyler Alexander Mann , Kari Wahlgren , Olivia Olson , Ariel Winter , John O'Hurley , Jane Carr , Malcolm McDowell , Barry Bostwick , Allison Janney , Madison Pettis .