If you want to do something clever for your trick or treaters and promote Nancy Drew, here's an easy and quick project. Click here for the PDF file.
The file contains some small bookmarks which you can print on cardstock and then cut out. Laminate them if you wish to make them more sturdy. If you don't have a laminator or cardstock on hand, you can have this done at your local copy shops.
The bottom 4 images are labels you can print out and adhere to treat bags or tape onto candy bars with double sided tape (works best).
TIP: If you don't want to print the bookmarks in color, have them do black/white printing on orange cardstock.