This is a brilliant example of both technical and social innovation, using waste products turned into toys for children. It is also a wonderful demonstration of using those same toys to teach some basic science. John Robinson and I have argued since 1995 that we have enough science, we know enough, we have enough information to act now for sustainable development. Imagine if we could also design and redesign with such elegant simplicity as the toys in this video. Imagine the possibilities.
I now know why roof trusses are always a triangle.