Hexbug Micro Robot Crab If you loved the Hexbug Nano, you will love these micro robotic crabs! These amazing little robots react to light and sound. It will hide in shaded areas until light or a loud sound chases it out of its hiding place! The Hexbug Crab will change it's direction automatically or when it hears a loud sound such as a clap. A brilliant gadget gift for Birthdays and stocking fillers, these stylish micro robots will keep everyone entertained and make a brilliant present for children and adults alike! Their opaque bodies show off an intricate circuit board and micro robotics.