The "official" non-parody version.

Up in the air, Junior Birdmen
(Junior Birdmen of America Song, Traditional)

Up in the air, Junior Birdman
Flying so high off the ground
is it a bird, plane or Superman,

(shout) No!

(sing) It's Junior Birdman upside down.
And when you hear the doorbell ring.
When you see that badge of tin.
Then you will know that Junior Birdman
has turned his box tops in.


The "box tops" were from the officially "approved" airplane, and later rocket, modeling kits.