Well it's safe to say that Blender is an exception. Blender is the free open source 3D content creation suite, available for all major operating systems. It is a complete suite of 3D modeling, rendering and animation applications which all function within a well-designed user interface. But wait - that's not all. Blender.org also offers free videos and online tutorials to walk you through the entire suite of programs.
Here's a very short 3D animation I created after a couple of hours of noodling. The model or "mesh" was downloaded from Star Trek: Blender.
3D modeling and animation has a steep learning curve. With Blender, you have the opportunity to develop those skills without having to drop hundreds or even thousands of dollars on a comparable 3D application suite.