Last year, I put together a unit study for kindergarten geography based on National Geographic Kids Beginner's World Atlas. The boys loved it. It was a simple overview of the world by continents. We touched on the people, the culture, and animals.
History through the Ages: Creation to Christ. This is a wonderful introduction to a timeline. We taped butcher paper to a wall and have been gluing the pictures to it. I absolutely love the details of this timeline and all the events that are included. Did you know the Ice Age happened in between Noah's Ark and the Tower of Babel? I didn't.
Bede's History of Us. Oh my wow. I LOVE this book. We skipped the predecessor, Bede's History of Me, which is designed more for Kindergarteners but if we finish History of Us in enough time, I may back track and add on History of Me just because I love the books.
Although we are teaching two timelines, the periods will not overlap at all and they very much feel like two different subjects.
I love starting history early in the boys' education to give them a sense of past as well as present. It helps kids to see the big picture and where they fit in it.