I and my friends have some interactive 3D demos that we'd like share with you. Strictly these are not animations, and we call them Virtual Reality. I don't know where to post them and I think here is most fit.
Every demo is an executable file (.exe). I promise they contain no virus or unwanted contents, as long as you download through our website. However we didn't test them for every antivirus software.
If you think them helpful or need improvement, we'll be very happy to hear from you.