Tile Grid system but using textured cubes instead of sprite tiles

Sorry, if wrong place for the question. I am looking functionality similar to smile game builder where users use 3d cubes for creating ground and walls. Basically same thing like with sprite tile map but instead sprite tiles I want use 3d cubes. Are there any ready to use solutions?

Check attached screenshot for what I am looking for

 

this is something quite complex, you would have to custom code it yourself.

Or just use smile game builder