I use cray fish as food, however I would like to set up a tank for my son, so he can have his very own "little lobster" as he calls them. Where do I start? I have been trying to find information via web and LFS, but nobody seems to know anything about how to keep them as pets. I need to know what size tank all the way up to what to feed them. I am not looking for anything fancy, just one of the feeder ones that I get from the LFS. Any info at all will be helpful thanks.