Use – Programmable animation software.
Cost – Free
Scratch is a new programming language that makes it easy to create your own interactive stories, animations, games, music, and art — and share your creations on the web.
Scratch is designed to help young people (ages 8 and up) develop 21st century learning skills. As they create Scratch projects, young people learn important mathematical and computational ideas, while also gaining a deeper understanding of the process of design.
Download program: http://scratch.mit.edu/about
**http://www.learnscratch.org/– incredibly detailed, and excellent for projects.