Hi, this is my first tab so please don't be harsh, also all I've 
really done is take the other tab and edited it a bit to make it 
simpler.

I love this song and when I first saw the show I had to know how 
to play the theme, I looked on here and the only chords were what
I thought was a bit complicated, especially for a kids song! I 
realised that it could be made simpler with a capo on the 1st fret
and dropping everything, but I also changed a few notes around 
to make it a bit better in my opinion.

There is a longer version on the album with a few extra verses and 
without the talking bits, but it's just the same chords so you can 
probably figure that out. So here it is...

CAPO ON 1ST FRET

C (x32010@1)         BmThere's (x24432@1)104 days of summer vacation
    A (x02220@1)                        GAnd (320003@1)school comes along just to end it
       C (x32010@1)                Bm (x24432@1)  
So the annual problem for our generation
   A (x02220@1)                   DIs (xx0232@1)finding a good way to spend it

Like maybe...

GBuilding (320003@1)a rocket

Or fighting a mummy
   AOr (x02220@1)climbing up the Eiffel Tower

DDiscovering (xx0232@1)something that doesn't exist (Hey!)
   G (320003@1)                        G (320003@1) F# (244322@1) F (133211@1) EOr (022100@1)giving a monkey a shower

ESurfing (022100@1)tidal waves

Creating nanobots
   A (x02220@1)                              		
Or locating Frankenstein's brain (It's over here!)

F#Finding (244322@1)a dodo bird

Painting a continent
   DOr (xx0232@1)driving our sister insane (Phineas!)

GAs (320003@1)you can see

There's a whole lot of stuff to do
ABefore (x02220@1)school starts this fall (Come on Perry!)

G (320003@1)                     F (133211@1)         ESo (022100@1)stick with us 'cause Phineas and Ferb
    A (x02220@1)   D (xx0232@1)   EAre (022100@1)gonna do it all!

G (320003@1)                     F (133211@1)         ESo (022100@1)stick with us 'cause Phineas and Ferb
    A (x02220@1)   D (xx0232@1)   GAre (320003@1)gonna do it all!

(Mom! Phineas and Ferb are making a title sequence!) (G to end)

Hope you liked it,
JJB1