Stretch the muscles in their faces. Show them some silly faces that they can make and encourage them to think of their own funny expressions.
Instruct them to use their hands to push their cheeks together. This stretch loosens up their lips, so that they are prepared when you start a song.
Tell the children to open and close their mouths. This stretch is helpful at stretching out their mouths, so that they can sing clearer and move their mouths with ease during a song.
Move the whole body. Ask the children to reach their hands to their toes and then up towards the sky. The whole body is put at ease and ready to start a new song.