The topic of the diploma thesis is the creation of key chains using 3D printing for the needs of the University of Zadar. The paper provides a detailed description of the entire process of making key chains, starting with designing in a 3D modeling program such as Blender, where the model creation process is presented, including the selection of appropriate tools and techniques in the software. After the design, the preparation of the model for 3D printing is described in the so-called preparation program. slicing, which allows segmentation of the model to optimize printing. Next, the 3D printing process itself and the preparation of the 3D printer itself for printing, including the calibration of the printer to ensure quality production, are described. Finally, the finishing of the model is described in order to achieve the desired aesthetics. In addition to describing the creation of key chains, the paper also deals with 3D printing in general, covering details related to 3D printing, including history, different techniques, description of different materials and software, and applications of 3D printing in various industries. The aim of this work is to familiarize the public with the 3D printing technique and the 3D printing process through various examples, applications, information and the very example of making a keychain. At the end of the work, a survey was conducted in order to investigate the level of information about 3D printing among the respondents and to evaluate the success of the creation of key chains. The work aims to bring the 3D printing technique closer to a wider audience, providing a detailed insight into each step of the process and various information related to 3D printing.