I cut this Zen Garden with a Shopbot Buddy Automated Router. Just pour colored sand into the holes and rake it!
Step 1: File
Make a solidworks file (or take mine).
Step 2: Cut!
Now cut your part with your CNC (or use a 3D Printer), if your printer uses PartWorks 3D or is a ShopBot Buddy, it will work with mine. If you cut it with my files, use a 1/2 in straight fluted bit for roughing and 1/8 in rounded ballnose for finishing.