Not from Autodesk if you are looking to create solids. Try a Google search, just realize that technically it's a violation of your license to add features Autodesk has taken out of LT.
If you mean extruded lines etc though, LT can do that with no add-on: help yourself (turn the volume down if you are in an office) www.youtube.com/watch?v=OHcBV4xz4ZY
AutoCAD LT can draw wireframe 3D and a pseudo shaded 3D by giving a closed polyline a thickness. It can also be used to view objects (solids and surfaces) created in AutoCAD. Once exploded, individual surface objects can be manipulated somewhat similar to doing paper machét. Rendering is limited to basic shademodes.