This construction kit challenges you to not only build, but is also build a fully functional VEX Robotic Catapult at the same time! Explore the technology behind some of the most influential inventions of our culture's Age of Innovation! Inspired by ancient Greek and Roman designs, this modern Catapult has a ratcheting winch that can control the distance projectiles are thrown. Crank the winch to its maximum tension, and you can hurl balls over 10 feet! HEXBUG believes in using the fun of robotic toys to teach kids important STEM principles through hands on learning.The VEX Robotics Catapult feature two alternate builds for more robotic fun!