I will Never Understand

So, I heard Nicholas singing in the utility room...
"All the children say, although made of hay, that he came to life that day!"

...
I kept eating.
He came into the room, and said "hey, guess what, Caitlin?"
"What?"
"(singing) All the children say, although made of hay, that he came to life that day!"
**blank stare from Caitlin**
"...It's like... Frosty the Snowman, only... hay."
"Right."

...
He walks into another room.
"Hey, listen you guys! - *sings weird little song yet again*"
He's met with silence.
Abby stops what she's doing to ponder this little ditty a moment.
"All the children say.... huh?"
"(pronounced clearly and slowly) All the children say, although made of hay, that he came to life that day. "
"Ohh..."
more silence.
"Hey, Abby, guess who that song is about?"
"...um... Frosty the Strawman?"
"Nope! Earl the Scarecrow!"