A hide-and-seek rhyme dressed up as an alphabet lesson, with a cat hiding in the cupboard for good measure. Short, bouncy, and over almost as soon as it starts.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
Great A, little a,
Bouncing B!
The cat's in the cupboard,
And can't see me.
About this rhyme
Confirmed: 'Great A, Little A, Bouncing B' is widely documented as a traditional peekaboo/peep-bo rhyme, performed with arms opening on 'Big/Great A, little a', a bounce on 'Bouncing B', hands over eyes on 'the cat's in the cupboard... can't see', then uncovering. Only the first two letters (A, B) are taught, which the draft correctly frames as 'the first letters' rather than the whole alphabet.
This one teaches the first letters of the alphabet through a small hiding game rather than a straight recitation. Say it while playing peep-bo, popping into view on 'can't see me'. The cat in the cupboard is just there for the rhyme and the fun, not for any deeper reason.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition