Bring the Jurassic Era to life in your home! The K'NEX K'NEXosaurus Motorised Building Set offers you a chance to experience the amazing world of dinosaurs by creating your own that can move! 2 builds in 1, you can build a K'NEXosaurus Rex and a Megasaurus dinosaur using the 255 parts and pieces included in this set. The K'NEXosaurus Motorised Building Set also includes a battery-powered motor to operate the dinosaur structures. Watch your dinosaur come to life! This building set also has downloadable step-by-step instructions for two motorized builds. Each STEAM build is designed for a more exciting play. Promote your kids' development of STEAM (science, technology, engineering, arts, and math) concepts by igniting their natural curiosity and creativity. Building with K'NEX puts children on the path to a fundamental understanding of STEAM subjects. Let them design, construct, and customize their own K'NEX structures and enjoy hours of fun playing with them!