The next step will be integration.
Alice: Video demo
Alice provide students with the first exposure to programming interactive 3D graphics; students ranging from middle schoolers to college.
Google SketchUp is a deceptively simple, amazingly powerful tool for creating, viewing, and modifying 3D ideas quickly and easily. Google SketchUp was developed to combine the elegance and spontaneity of pencil sketching with the speed and flexibility of today's digital media.
Plugins: 3D PDF exporter, PDF sample
Blender is the open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback.