The chords for the whole song are:

D              Em                     G                       A
You and I in a little toy shop buy a bag of ballons with the money we got
D                     Em                 G                      A
Set them free at the break of dawn, till one by one, they were gone . . .

(So forth and so on)


. . . Floating in the summer sky, as 99 red ballons go by


Then the solo:


E---------------------------------------
A--------------0------------------------
D-0-0---0----2---2--0---0-0--0----------
G-----2---2-----------2-----2--2-0-0-0h2
B---------------------------------------
E---------------------------------------