The phrase "nature of science" refers to the characteristics of scientific knowledge that necessarily result from the scientific investigations that scientists conduct to develop knowledge. Yet, these characteristics are assumed by many to be "difficult" to teach. Not so. Many important aspects of nature of science can be directly linked to content traditionally taught in elementary level science--the key is to explicitly highlight each characteristic as students experience it to generate awareness. One important point that relates to nature of science is an understanding of the distinction between observation and inference. Observations are descriptive statements about natural phenomena that are "directly" accessible to the senses. For example, students can describe an animal as having sharp teeth, fur, and a long tail, and it barks. Inferences are statements about phenomena that are not "directly" accessible to the senses, such as an animal being friendly, tired, or hungry. Keeping these points in mind, incorporating activities like the one described in this article can help teachers make these nature of science connections apparent to students.