Watch your marbles take off like a shot with the GraviTrax Magnetic Cannon!Launch your marble through your run with the amazingly powerful GraviTrax Magnetic Cannon! Simply place two marbles in front of the Cannon; when your marble hits, it sends the front marble blasting down the track! A high-powered magnet gives the marble a burst of speed to help extend your run up inclines and down tracks. A great addition to any GraviTrax Starter-Set; comes with 3 additional colored marbles. Experience the power of gravity and educational fun today!What makes a great toy? GraviTrax checks all the boxes! Its a creative, modular, expandable track system that challenges children to use their imagination to design and build their own marble runs! Electronic-free, GraviTrax construction sets use STEM-friendly concepts while building critical thinking and problem-solving skills. Completely open-ended, every GraviTrax set has a boredom-busting variety of play options for hours of fascinating fun. Once the basics are mastered, simply add expansion sets and accessories to propel those metal marbles around the tricked-out track of your dreams!Comes complete with 1 Magnetic Cannon, 3 colored marbles and instructions.Lasting durability for girls and boys ages 8 and up, its the learning toy children (and savvy adults) return to over and over again!