Do you have a school library or plan to have one? Why not hand a bookmark to students when they borrow a book ?
Guaranteed success !!!!
Here is a collection of 12 bookmarks on Halloween with different background. It’s a sample of the product you can purchase on my store: 180 Color-me bookmarks (14 other different themes)
All you have to do is print your bookmarks and cut them ! Easy right ?!
Your students will then be able to color the one they chose.