thirty minutes
There are two parts, with wich both are a half hour, so an hour.
Just recently they have in the hour long special "Summer belongs to you"
"Why is your neck so long?" is from Phineas and Ferb. A kid that Candace, Phineas and Ferb's sister is reading to asks in an episode
all i know is that his legs are VERY long
5 years
Ever since they were really young. To see them get Perry, watch Phineas and Ferb Across the Second Dimension.
Movie:77 minutes long
the sound track is on stores now you can find it at a children store or any store u can find it :]
They had Perry for 5 years.
15 or 30 mins
an hour and 30 min
the show first aired in 2007