Here is another example of a Earth Science Lap book from Peakmore Academy:
There are also some great ideas in The Big Book of Books.
The kids love crafting homemade displays to highlight special studies done throughout the year, then showing off their creativity when grandparents visit. We may even return to the idea of hosting an annual open house to display their handiwork for family and friends. It provides a forum for my students to make oral presentations, recite memorized poetry, and display well written essays. Neatness and attention to detail increase when it is more than Mom reviewing the work. It also gives us an excuse to invite the relatives to play "Are You Smarter Than a Homeschooler." I'll be posting again when our creations have been completed. Good luck and happy lap booking!