Smart, sturdy little book-like boxes that, once opened, reveal a clear plastic box containing a hand-cranked musical movement. Each individual box features a charming picture on the front cover, giving some clue to the tune it produces, and the back cover shows the first line of the song. There are four, assorted, festive melodies; 'Silent Night', 'We Wish You a Merry Christmas', 'Jingle Bells' and 'Rudolph the Red-Nosed Reindeer'.