Little Betty Blue loses one holiday shoe, and the simple fix is to give her another to match. A small, tidy problem-and-solution rhyme that very young children follow easily.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
Little Betty Blue
Lost her holiday shoe;
What shall little Betty do?
Give her another
To match the other
And then she'll walk upon two.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition