Owen and Eleanor make things up
(Book)

"Owen is doing the same creative writing project for homeschooling that Eleanor is doing in public school! They have to write an interesting story about their lives. The problem is: their lives aren't that interesting. So Eleanor decides to fix the problem by doing exciting things--with not-so-great results. When they join a community martial arts class, Owen sees a different way to make an interesting story happen ... by making something up that sounds true even though it isn't. When they both end up in trouble--again--they learn that making up fake stories to fool people isn't a good way to live." --,(Source of summary not specified)