A fascinating article in Science Daily has come to my attention.
"ScienceDaily (Nov. 30, 2010) — A revolutionary new idea on the movement of big monument stones like those at Stonehenge has been put forward by an archaeology student at the University of Exeter." (Source)
Undergraduate Andrew Young tested his theory that carved stone balls found close to sites with Neolithic monuments must of had a purpose.
Long story short, they made a wooden track with a groove. Put the balls in the groove. And had a flat piece of wood with concrete slabs that simulate the weight of these monuments on it.
The platform with these concrete slabs moved with ease!
Neolithic people might not have used this method, but it possible.
Have a look at the rest of the article here, and a picture of the study: