Another book that we bought recently is "Getting Started with Latin," by William E. Linney. No-one in our family has ever studied Latin before, so we plan to work through the book at a snail's pace. That way even 2-year-old E can keep up. Here's an activity that we did after learning the Latin word for 'sailor':
We made basic origami sailboats and little cardboard sailors to sit in them. Here's the folding instructions:
We have also watched this [three pigs] cute video a few times. It's fun to watch even if you aren't learning Latin.