This lesson is a great way to have students understand the work paleontologists do and how we know so much about dinosaurs and other prehistoric creatures we never saw alive. I start the activity by telling my students there was a visitor in our classroom last night and clues were left behind. I show the students one clue at a time so they can draw the artifact and then make speculations based on what they see. The first clue/artifact is a small diaper. The second is a pair of pink booties. From there the children often infer that there was a human baby, with two legs, and probably a girl. We then use this as a catalyst for discussion on how paleontologists know so much about dinosaurs and other life from the fossils (clues) left behind.