Build your very own robotic hornet with real motorised action and watch it come to life with the 157-piece K'NEX Robo-Sting Building Set! Robo-Sting not only looks like a high-tech robot, but moves like one too: with the included battery-powered motor, your creation crawls across the ground on all six of its legs, flapping its wings in the air a vicious hornet, ready to sting.Follow the step-by-step instructions to create the exciting Robo-Sting, or challenge yourself to build the biggest, baddest, motor-controlled robot creature you can imagine.Collect and build the entire K'NEX Robo-Creatures Series for the ultimate team, then combine them to build the ultimate three-motor Robo-creature! All K'NEX parts and pieces are guaranteed for a lifetime of fun and all K'NEX bricks, rods, and connectors proudly made in the USA.This set is perfect for builders ages 7 and up.Requires 2 "AA" batteries, not included.