A lot more complicated than I thought, but not too bad. It's recommended you get a 10 gallon tank or a 5 gallon tank, and place some sort of play sand (the consistency of sand to build sand castles) for them to burrow into so they can molt. Then you want a bowl for water (preferably bottled or non-chlorinated) and a bowl of salt water and a bowl for food. Then they pretty much eat anything, like veggies and fruits. You can even feed them some scrambled eggs if you'd like, and apparently they like cheddar cheese.
Mine currently gets some parsley and strawberries and tomorrow he'll get some eggs with parsley cooked in, since they're supposed to love it.
They can also run around if you want, just make sure they don't get into anything. They're a lot easier to take care of than a dog. xD