The links below are to interactive websites:

http://scratch.mit.edu/
Scratch is a programming language that makes it easy to create your own interactive stories, animations, games, music, and art, and share your creations on the web.
As young people create and share Scratch projects, they learn important mathematical and computational ideas, while also learning to think creatively, reason systematically, and work collaboratively.

http://www.alice.org
An educational software that teaches students computer programming in a 3D environment.
Alice is an innovative 3D programming environment that makes it easy to create an animations for telling a story, playing an interactive game, or a video to share on the web. It allows students to learn fundamental programming concepts in the context of creating animated movies and simple video games.

http://www.blender.org/
Blender is free software which enables people to create, model, shade, animate, render composite and interact in 3D.

http://www.daz3d.com/i/software/bryce7/-/? - : -
Create you own terrestrial paradise with this highly accessible and professional 3D landscaping and animation tool.