Solids

Solids 

Solid modeling is the easiest type of 3D modeling to use. With the
AutoCAD solid modeler, you can make 3D objects by creating basic
3D shapes: boxes, cones, cylinders, spheres, wedges, and tori (donuts).
You can then combine these shapes to create more complex
solids by joining or subtracting them or finding their intersecting (overlapping)
volume. You can also create solids by sweeping a 2D object
along a path or revolving it about an axis.
NOTE: Because each modeling type uses a different method for
constructing 3D models and editing methods vary in their effect on the
different model types, it is recommended that you not mix modeling
methods.
1. Choose Draw, Solids.