Each week's Bible Dig include Explorations that are specific to that week's memorized content. Often, the final product of the child's study is a lapbook. For more on lapbooks themselves, go to the post included in the Bible Quests at Home category of the forum, here.
When I do lapbooks in the classroom, I try to prepare and print as many materials as I can that the students will need prior to class time so that they aren't having to develop the lapbook on their own (we don't have enough time!). This cuts down on their creativity potential, but in a large group context, this isn't my greatest concern. Creativity isn't the primary value here - knowing God's Word is. If they want to be more creative, they can certainly take their projects home and do all that they wish.
If the students are particularly young, I will even cut out physical flaps and whatnot so that all that the students are doing is coloring and pasting their materials.