Books 1 & 2 of Nancy Rue's Sophie series, from Christian publisher Zondervan's Zonderkidz imprint. Not available to Canada.
Sophie's World [Sony]
[In the first fiction book of the Faithgirlz!(tm) series, best-selling author Nancy Rue introduces Sophie LaCroix, a creative soul who's destined to become a great film director someday. When her overactive imagination immerses her in the American Revolution after a school field trip, Sophie quickly learns a real-life lesson.
Sophie's Secret [Sony]
When some of Sophie's relatives come to town for Thanksgiving and create a whirlwind of sightseeing, including nearby Jamestown, Sophie sees an archeological excavation in progress and pictures herself as a female Indiana Jones.
These are by the same author who did the "Lucy" freebies offered previously, so if you/your kids happened to like those, then these will likely be worth picking up.