If you enjoy watching Phineas and Ferb on Disney Channel and you have missed a number of those episodes or simply need to enjoy viewing them , here are five witty episodes to watch for a fun filled day.The episode titled "Crack That Whip" was aired on May 24, 2008 on Disney. In this event, Phineas and Ferb surprise their grandma by building a roller-derby rink because of her. Grandma, who participated in a championship derby team employs the chance to skate against her rival, none other than Jer...