The story of a young kangaroo being put to bed provides the setting for sharing a series of original songs to the tunes of popular lullabies.  At the top of the page for each song it tells the reader what tune to use (e.g. Twinkle, Twinkle Little Star or Rock-a-Bye Baby), but the words are new, with illustrations set to match.  It would be fun to share with students and see if they could identify the tune, and maybe even inspire them to write their own original re-writes.