We are getting down to the wire with only four weeks left to finish this project and make it gallery ready. I have been researching materials for the artificial water and cracked clay for the puzzle boards. I am thinking of using a resin or epoxy for the water since it is durable, fairly easy to use (as far as I can gather) and not too expensive, and for the obvious reason, it looks somewhat like water. I am still unsure about the clay situation. I may be able to get my hands on a bucket of clay from a site property, but since the ground is frozen it may be difficult. If this doesn't work, pottery clay of some sort may have to be used and perhaps some type of faux finish or process can be done to make the clay look cracked. I am going to drop in to Curry's tomorrow and check out my options.
This is what we would typically want the clay to look like:

The resin looks like water, example of it in a beaker:

Craig went to the wood shop yesterday and hopefully I will be able to get some definite dimensions soon.