Is really easy and fast to make.
In Italian we call them "ometti" (http://it.wikipedia.org/wiki/Ometto). But they have different names every where you go.
Step 1: WHAT YOU NEED
-Some see stones, of different measures ;
-Popsicle stick (large).
Step 2: GLUE THE STONES
Try to keep every center of the stones in the same hypothetical vertical line, so that they will look in balance.
Step 3: PREPARE THE BASE
Cut two segment of the popsicle stick (of the same size), cut a slash in each one (opposite, and of the same size) in each stick, like in the photo.
Push one segment of the popsicle stick in the other, perpendicular, forming an "x" shape, like in the photo.