More and more things are made using 3D models and a lot of material we previously found only in books now appears on web pages. In the diploma work, we wanted to explore the field of 3D modelling. We describe the tools used in the development of a 3D environment, a character and a website with tutorials. We theoretically describe the processes used in 3D modelling, where we primarily focus on the Blender tool. A complementary part of this thesis is also a tutorial, that guides us through the process of making a 3D scene and is a part of the website. We also present the process of planning, designing and creating a website.