I Can Fly by Ruth Krauss, 1950.

This is a cute Little Golden Book about a little girl playing.

As she plays, she compares herself to various animals. When she’s on her swing, she feels like she’s flying like a bird, and when she swims, she feels like a fish.

The story is told in rhyme, and in the back of the book, there is actually music so you can sing the rhyme as a song.

There are different printings of this book, some with different illustrations. The different versions also have different words, and it looks like the newer one includes both a boy and a girl and doesn’t have the music for the song. One of the newer versions is available to borrow for free online through Internet Archive.