My kids love the Jonathan Park Adventure series ( it is very religious with a creation (young earth) worldview). They are packed with science, geography, and history. We have used these as supplements to science primarily. Most of them come with an activity book or you can download it for free from the series website. We have also used kiddie records (for fun). I have to admit we've used it in place of classical music during quiet play time. Afterwords my kiddos would narrate to me what the program/story was about. It really helped my oldest learn to narrate. A lot of the kiddie records (freebie site online) are short and we burn them to a CD, you could always play them from your computer or download them to your mp3 player. Another idea that we have tried a few times is listening to audio books instead of reading the book. Last year, we listened to quite a few picture type books via audio and then did lapbooks from homeschoolshare. We have listened to other books from other sites and the library and then I have grabbed worksheets, projects, or unit study type extras to go along from the web.

I would suggest "Pocketful of Pinecones" written by Karen Andreola. It's a wonderful book about nature study written in a diary form by a fictional homeschool mother living in the mid-1900's. It's purpose is to introduce the Charlotte Mason way of nature study. It really shows how to add nature study into your homeschooling.