Pick if you want one bookmark or 4 bookmarks. Print them out and let the kids cut it out. Print on card stock or if you print on regular paper you could laminate during class time. Let them color the bookmark and write their name on the back of it before you laminate it.
You could print them and do them yourself and give them out in ziplock bags filled with prizes and candy. We have a Corn Sunday School Lesson that this goes with. Has coloring page, maze, cupcakes, templates and more.