Feel the electricity run through your body with the Electric Inferno Roller Coaster Building Set, from K'NEX! Using the 639 K'NEX parts and pieces including rods, connectors, and track create this electric inferno that sends the coaster car hurtling through the twists and turns. Then, download exclusive instructions to build an incredible second model. All K'NEX rods and connectors are made in the USA! Age 9+. Requires 2 "AA" batteries which are not included.