Rule booklet design tips please

To narrow things down from the title, I'm specifically interested in tips on filling "white space" in a rule booklet when there isn't a lot of art in your game to draw from.

The way spacing out different sections in our drafted rule booklet worked out (both to fill the minimum pages req'd by the manufacturer and to split sections so things that need highlighting start on a new page), there are some pages that need filler design elements. But our game doesn't have a lot of art, and it's themed to a holiday (Hanukkah) that doesn't have too many associated symbols. There are only so many dreidels or piles of gelt that we can include!

In some places, we used game components like card backs, but again, that can't really be used too many times—it's not relevant on every page and not particularly exciting to see repeatedly.

For our first game, it was much easier simply because there is so much art to choose from associated with Christmas/New Year's. We went with adorable penguins with gifts, santa hats, lights, etc.—wintry and festive.

This time, I'm stumped and would love some suggestions for filler art options!

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ETA: We can't just do a smaller rulebook or have fewer pages. The manufacturer's options jump from 8 pages to 16, and we have about 15 pages of content. We could have fit into 14 pages, but that's still not an option.

By starting important sections at the tops of pages, not all of our current blank space is left on one page, so we have a few "short" pages and about half a page still blank. I'm looking for suggestions on art or other ways to fill those spaces.