If you enjoy the Charlotte Mason Method of homeschooling you probably have heard of Nature study. Here is a list of resources that can help you facilitate the art of nature study with your children.
HANDBOOK OF NATURE STUDY
Free access to the entire book found here: Handbook of Nature Study - at internet archives
Nature for the Very Young: A Handbook of Indoor and Outdoor Activities
Keeping a Nature Journal: Discover a Whole New Way of Seeing the World
Sharing Nature with Children, 20th Anniversary Edition
A blog that may interest you: .handbookofnaturestudy.blogspot.com/