It came from Pinterest. It says its from a blog called "kindergarten corral". I wanted to make a link directly there, but I cannot find it on that blog.
It is the words to Dr Jean's song, "Good-bye" written as a poem.
Here is a Link to a site that has a reader to go along with this poem/song. Even if you do not want to use it as a reader, you can print it with several book pages on each page. That way the pictures will print smaller and you can cut them out for illustrations for the poem.