Robots have been captivating imaginations for years. Today you can buy spy robots with digital cameras, as well as the old classic robots right out of the 50's era. The Hexbug Crab has been around for years and still is very exciting! Innovation First has been leading the robotic toy maker, and even won the prestigious Best of Innovation Award at the 2006 International Consumer Electronics Show. VEX Robotics, Inc. (a subsidiary of Innovation First International) is also a leader in the supply of competition and hobby-robotics products. Their tiny robotic crab has been a popular choice by adults and kids alike for years. The crab is battery-powered and moves almost like the real thing. It reacts to light and sound. Clap or stomp near the crab and it will turn around; wave your hand in front of it and the crab will change direction. Size- 2" x 2.5"