using bullet in blender. how?

does any one know how to use bullet in blender?
to create stuff like the incredible machine.

How to learn Bullet Physics Engine in Blender? You’ll have to go about learning the Basics of Blender’s Game Engine, or at least the physics portion.

Hello “horosuma”,I think you are new in BGE(I am not so old too), Blender already comes with Bullet integrated with him, is just to enjoy it.