We read Crinkleroot's Guide to Knowing the Trees

This was a fun book to go over with the Tiny Trekkers after exploring the girth of trees, tree rings and roots.  All are covered in this book.  It was a little wordy for the preschoolers but fun to look at the funny man who "knows" trees! I adapted the book for the different ages in my classes.  You can do this at home by adding in more or less of the information while watching your child's attention span.