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 Constructop[Read More]

Build a realistic and scary spider with eight long legs, big fangs and a bulging abdomen that can move up and down. Make it even scarier by rebuilding it into a creepy bug or slithering snake. Spider legs move at two joints. Includes instructions to build both models. Spider measures over 10" wide. 193 pieces.

Create a mighty T. rex with a movable head, jaw and tail. Next, build an awesome, armored Stegosaurus…and a huge, high-soaring Pteranodon. These are just a few of the prehistoric beasts you can create with the 719 pieces in this creative LEGO set.

Return to the world of the dinosaurs. Create a mighty T-Rex with moveable jaw, head and tail. Then take him apart and build your own incredible world of dinosaurs. Includes 10 instructions and inspiration for 26 models. Includes 719 LEGO pieces.