Some fossil examples are rare, but the educational value of such samples is undeniable. One way around this dilemma, and one that was popular in the late 1800s and early 1900s, was to have students study 3-D models; this solution was used by many universities, among them Cornell University. One of the main, but not the only, suppliers of such models was Ward’s Natural Science Establishment of Rochester, New York, USA, which was founded in 1862 by Henry Augustus Ward (1834–1906). Even today the use of virtual, computer-generated 3-D models in classroom laboratories indicates how important 3-D visualization continues to be. But a computer image cannot be held in one’s hands, so the use of 3-D printer technology allows students to create their own physical models. However, none of these technologies can totally replace seeing and working with actual specimens or life-sized reproductions. Thus, museum displays are still an important aspect of educational activity for both students and the general public. This chapter explores how Cornell University made use of the models purchased from Ward’s in the late 1800s and the fate of some of these replicas.