I bought a glass top metal table table at a thrift store, the space in the center of the table was about 17 inches round.
I decided to make some thing to fill the empty space.
I took Aspire's Scallop Shell.crv3d made it 17 inches and it was 1.0871 inch deep. I wanted it to be deeper, about 5.5 inches deep so I made a component of the out line of the shell 4.25 inches deep. Finished ended up to be 5.6191 deep. I glued up two pieces of 3/4 mdf for each of the three sections. It took about 6.15 hours to cut with a .375 ball nose. I cut the center part of what would be the top two pieces out to create a hole. Glued it all together. Sanded, sanded and sanded some more
I found a Loggerhead Sea Turtle for 3d printing at http://www.thingiverse.com/
made by 4MULE8, adapted it to cut on the cnc. I ended up making 17 of them 3 inches long out of some green corian I had laying around.
Bought a few ping pong balls to use as eggs, some sand blasting sand and went to work. Started laying everything out. Put a layer of glue then layered sand several times to build up a base. Glued the eggs, turtles and a few small shells I picked up at the beach to make it realistic