These cute crustaceans have inter-changeable shells just like the real thing and they scuttle along flat surfaces. If your little toy robot hits an obstacle it will reverse out and try a different route!If you want to find novelty toys for Christmas stocking fillers or kids birthday gifts, Xia Xia Pet Crabs will not disappoint. Let your little nippers get their claws on a toy crab and they"ll want to cultivate a whole colony.