Lego Mindstorms Extreme Creatures

For ages 12 years + up and contains 149 pieces Add this expansion set to the Robotics Invention System to create creatures that can bite, sting, pinch, and pounce. Use flashing fiber optics to alarm intruders or lure unsuspecting prey. Chose from 149 new parts. Conquer 12 CD-ROM Challenges using hints and tips from the Extreme Creatures Constructopedia. Program your creature to work in a pair or a pack. This set includes: - 149 pieces - extreme creatures cd-rom software - extreme creatures constructopedia - 12 guided challenges - fiber optic strands. Requires Robots Invention System (RIS) not included.