Animal Tracks by Arthur Dorros is just a very sweet little book for young children. Apparently, Amazon doesn't sell any new copies. I don't know if it is available new anywhere else or not, but perhaps your library would have it. We checked it out at our library.
Each page has questions in the story line and there is always expectation of what is coming next. The guess can always be an educated one, because of the tracks that are shown.
I thought it was just a fun story to read with my little ones. A great science book!