From a song by Woody Guthrie:
Well, a curly-headed girl with a bright shining smile
Heard the roar of a plane as it sailed through the sky
To her playmates she said, with a bright twinkling eye
My Daddy flies that ship in the skyMy Daddy flies that ship in the sky
My Daddy flies that ship in the sky
My Mama's not afraid and neither am I
'Cause my Daddy flies that ship in the skyThen a button-nosed kid, as he kicked up his heels
He said, My Daddy works in the iron and the steel
My Dad builds the planes and they fly through the sky
And that's what keeps your daddy up there so high
The bolded phrase was very hard for me to imagine. What did the boy actually do?
I found this definition for "kick up one's heels":
to do things that you enjoy:
After final exams we kicked up our heels and had a really good party.
This meaning clearly fails to fit the song.
I then googled for images. Is this "kicking up of heels" similar to this (as if dancing)?
Or to this:
Or he could have been "kicking up his heels" in any of the possible ways, and we should imagine it ourselves?