Put your pen to paper and create your own nature journal. This is a fun way to examine the world around you and create a lasting memento of your travels. When you see a plant or animal that you like, sit down and try and sketch it. It might be a little difficult if it is a larger more skittish animal like a deer or a raccoon, but you can be pretty safe around insects and birds.
You should take your time and really catch the nuances of each subject. When your done, do some reading and jot down some cool facts about then animal or label the different parts of the flower or other plant.
There is a cool sense of accomplishment in creating your own nature journals. You can read about the flowers and spend money on books, but chronicling your own observations would mean so much more to you. You can create different journals on different subjects such as flowers, herbs, leaves, trees, etc. Imagine the look on your children's face when they come across them and want to learn more about it. Your own nature journal can be a rewarding past time not only for you, but also your family.