Do you remember when pet rocks were popular? You can take them anywhere. They do not need any care, food or water. They travel very well, and anywhere. Those people who feel the need to have a pet but dont have the time or money or patience to care for a living one, this is the perfect answer. They come in very different looks, and you can safely say that no two are alike. By the way, you can leave them in a hot car with all the windows up too.