K'NEX Nintendo Mario Kart 7 Piranha Plant Slide Track Set Build Mario in his Glider Kart and race around a complete track! 1 buildable kart with high-speed battery-powered motor (requires 2AAA batteries, not included) Buildable Mario figure Moveable Piranha Plant Obstacle and Goomba Obstacle with buildable track system to make a complete loop with a jump. Recommended for builders 6+