K'NEX Mario Kart 8 Thwomp Ruins Building Set Build Mario and Yoshi in their Standard Karts and race around a complete track! 2 buildable karts with high-speed battery-powered motor (requires 2 AAA batteries, not included) Includes coins plus 2 items from the game Buildable, interconnect able track system to make a complete loop with a jump Recommended for builders ages 6+