- EIEIO
- Farmyard refrain of children's music
- Sung vowel sequence
- Vowels repeated after a new farm animal is named
- Vowel-laden song refrain
- Refrain in a song with animal noises
- Old Macdonald refrain
- Horse or cow trailers?
- Refrain heard on a school bus
- Rustic refrain
- Old MacDonald Had a Farm, ___
- Call on a farm
- Followers of "cows" or "pigs" in song
- Letters associated with animal noises
- Refrain from kindergarten?
- Refrain in pre-school
- Refrain on the farm
- Refrain with sheep?
- Cow, goat, sheep, etc., follower
- Line sung after "chicks," say
- Refrain from children's songs
- Toddler's refrain
- Refrain from farming?
- Refrain from the farm
- Farm refrain?
- Farm song refrain
- Sing-along line
- MacDonald's refrain
- Old MacDonald's refrain
- Children's-song refrain
- Kiddie-song refrain
- Refrain from the English song known in Chinese as "Old Mr. Wang Has Some Land"
- Refrain of a song sung by Elvis in his 1967 movie "Double Trouble" (seriously)
- Refrain swung (not a typo) by Ella Fitzgerald on her album "Whisper Not"
- Letters from childhood
- ...he had some cows follower
- Old MacDonald ending
- Old MacDonald Had a Farm refrain
- With a quack quack here preceder
- Vowel sequence shared by this puzzle's theme entries
- Letters for Old MacDonald
- Refrain in a children's song
- Kids' song refrain
- Refrain in "Old MacDonald"
- Barnyard refrain
- Farmer's refrain?
- Old McDonald's refrain
- ... had a farm follower
- Old MacDonald letters
- Child's refrain
- Farming song refrain
- Letters sung after "... had a farm"
- Preschool song refrain
- Refrain from singing about farm animals?
- Old MacDonald nonsense refrain
- End of a rustic refrain
- Refrain down on the farm
- Old MacDonald had a farm follower
- Familiar vowel sequence
- Kiddie chorus line
- Agrarian refrain
- Farmyard refrain
- Finish of a kindergarten tune
- Vowelly nursery rhyme interjection
- Farm follower?
- Tots' song refrain
- Nonsensical refrain
- ...farm, __
- ...had a farm, __
- ... a farm, __
- Familiar refrain
- Five-note refrain
- Common refrain that's a hint to this puzzle's theme
- All-vowels song refrain
- Letters sung after various animal names
- Refrain from singing about a farm?
- Followers of various animals?
- Kids' refrain
- Five-letter song refrain
- Kiddie's refrain
- Farm sequence?
- Three-note quintet
- Kindergarten refrain
- Refrain from singing as a child?
- String in a kids' song
- Three-note refrain
- Children's song refrain featured in the four longest answers
- Farm song letters
- Old Macdonald line
- Refrain on a farm
- End of a kids' song
- Refrain for Old MacDonald
- Familiar farm-song refrain
- End of a kindergarten tune
- End of a kindergarten song
- Nursery school refrain
- What the eight long answers have in common
- Kids' song conclusion
- Vowel sequence of song
- Kiddie song conclusion
- Kiddie chorus conclusion
- Old McDonald refrain
- Preschool song ender
- Old McDonald ender
- Old MacDonald conclusion
- Farm song conclusion
- Five-syllable refrain
- Refrain from childhood
- ... had a farm, ___
- Refrain from a children's song
- Refrain letters from "Old MacDonald"
- Refrain that might be heard on a school bus
- Refrain learned at an early age
- Theme scheme for this puzzle
- Toddlers' song refrain
- Children's refrain
- Consonantless refrain
- Horse or cow follower
- Refrain from a kids' song
- Vowely refrain
- Refrain from a preschool song
- Day camp song refrain
- Old MacDonald coda
- Letters on a farm?
- Farm letters?
- Refrain from children's singing?
- Farmer's letters?
- Follower of a duck, pig or cow
- Follower of cow, pig or horse
- Sequence sung by kids
- Follower of ducks, sheep or pigs
- Letters after many animal names
- Refrain from singing in kindergarten?
- Letters in a children's refrain
- What goes after cows, ducks and pigs?
- Letters associated with animal sounds
- Noted preschool sequence?
- Children's song refrain found at the starts of 17-, 26-, 35-, 50- and 57-Across
- Trailer for farm animals?
- Letters sung as mi, mi, re, re, do
- What might come after a cow or a sheep?
- Letters from down on the farm?
- Mi-mi-re-re-do, in a children's song
- Refrain from nursery singing
- Refrain in a children's song ... or a literal feature of 17-, 25-, 42- and 55-Across
- Follower of pigs or cows
- Letters heard after "cow," "pig" and "horse"
- Apt vowels missing from this phrase: TH_ L_TTL_ K_DS' S_NG
- Common refrain in pre-K circles
- MacDonald's jingle?
- Refrain in 51-Across that accompanies the sounds at 24-, 37- and 47-Across
- Childhood refrain
- 'Old MacDonald' sequence
- 'Old MacDonald' sequence found in this puzzle's 10 longest answers
- Letters sung by kids
- Follower of 'had a farm'
- Kiddie-song letters
- Refrain on a song farm
- Consonant-free chorus in a children's song
- Nursery-rhyme refrain sung to the tune "mi-mi-re-re-do"
- Refrain from preschool
- Old McDonald's vowel string
- ... had a farm, ___ (song refrain)
- Refrain letters
- Old MacDonald hHd a Farm refrain
- Vowels sung to children
- Vowel sequence in a children's song
- Old MacDonald vowels
- Barnyard song refrain
- Refrain in a farm song
- Vowels in "Old MacDonald"
- Children's song refrain that's all vowels
- Letters preceding "with a moo-moo here"
- Refrain consisting of vowels
- All-vowel refrain
- Refrain on Old MacDonald's farm
- Children's song letters
- Kindergarten song refrain
- Letters in a familiar refrain
- Childish refrain?
- Old MacDonald refrain, and a feature of the five longest Across answers
- Sung vowels
- Chorus in a kids' song
