Kitty Speak - this is interesting. some people believe that because cats have different "tail" language than dogs this is the reason for their feuding. But when a dog is raised as a young pup with cats, he learns cat "tail language".
Recycled jeans notebook or planner. Use a regular notebook, and cut up them jeans that the kids have outgrown. Also a good idea: using a larger notebook and a patch/screenprint from an old favorite shirt.