This warm-up is a great little exercise that works equally well for children and adults.
You can download the instructions and lyrics from the PDF tab at the top of this panel.
You can download an audio recording of Carolyn singing the song from the audio tab at the top of this panel.
Note that these links take you to the Vaughan Williams Memorial Library website which holds the full archival details of the material. Material on the Vaughan Williams Memorial Library website is not censored or expurgated and may contain material considered offensive by modern standards.