Spelling farm joke for kids

A Hoosier, a Kentuckian and a West Virginian were on a Hollywood TV quiz show.

The host asked them to complete the sentence: "Old MacDonald had a ..."

The Indianan said, "Old MacDonald had a carburetor."

"Sorry," said the MC. "That's incorrect."

"Old MacDonald had a flat tire," said the Kentuckian.

"Wrong," said the host. "Old MacDonald had a farm," said the West Virginian.

"That's correct!" shouted the MC.

"Now for $200,000, spell farm."

The West Virginian thought hard and then spelled carefully: "E-I-E-I-O."