Xia Xia Pets or Sha Sha Hermit crabs are electronic toys, which means they need batteries to become alive. What type of batteries you need and how to change them easily, you can find in the instruction. Each crab comes in individual pack with enclosed instruction, it's a small piece of sheet which shows you what parts toy consists from and how to handle little troubles you can have. For example toy become walk very slow or it doesn't react on your touches, it seems that it run out of batteries, so go ahead and change them. If you've got some trouble with your Xia Xia crab, tell us in comments and we all will try to help you to solve it.