If one had a three of suitably-shaped pieces of wood, one could move a cubic piece of stone by "rolling" it over the pieces in turn without much vertical motion of the stone's center of gravity. Interesting concept.
With four of them, you could take a twenty ton cubical stone for a stroll with just a small group of men. The ropes could be spliced as an endless loop.
Once you reach the ramp, you'll need some additional manpower, and you'd better slow down for the turns!
I think it would be fun, but I don't want to have to pay for the material.