Simply take some beautiful sort of paper (old-fashioned or not, your school-report or not) and wrap it, using glue, around a timer. I used a timer which was for free due to being advertisement.
The paper I used had been used for wrapping chocolate by a bakery. I hope this bakery doesn't get angry with me for using their paper!
I have to admit that I like the detail on the back of the book where it says "Zartbitter" (plain chocolate).
Btw, "Naschkätzchen" can maybe be translated as something close to "sweet toothy".