Alice
Alice is a free, open-source, 3-D graphics programming language. This has been the language that the VA/DC FLL State Championship uses for their "Video Game Programming" workshop.
The current version of Alice (version 2.2) can export what you create to ".mov" files. Click here for a sample.
Downloading Instructions
Click here to go to the download page for Alice 2.2 (the current release at the time of this writing). Follow the instructions below the link to install.