Do you mean computer 3D or the traditional 3 dimentional art? Anyway, try macromedia flash, java script, c++, etc for building your 3D animation art.
But for the 3 dimentional art (sculpture),
Additive Sculpture: buckets, mould, spatula, etc
Check this hub, you will find the list of tools and materials for sculpture. http://hubpages.com/art/Art-Introduction