Scratch is a creative programming "language" designed for kids 8 and up. (But I think just by virtue of being Twelevers, we all qualify as kids.)

Scratch is free, but you have to register at MIT to share your creations.
http://scratch.mit.edu/

So Scratch away, and let us know when you're ready to share your animated movies, games, etc.

Twollars!! and Praise!!