Hi I am looking for the easiest and user friendly software that can allow simplistic animations? any idea's or help would be grateful and appreciated. What I want to do is to create simple animated images for Newtonian and Relativity based Theories. A simple Idea just for starters is to show the Earth and its Gravitational Field at the Surface and further outwards. If anyone knows of an easy to use existing software product, be gratefull for some Guidence, thanks.