Buzz into action with the Hornet Swarm Roller Coaster Building Set, from K'NEX! You can build with over 600 K'NEX parts & pieces including rods, connectors and track to create this motorized stinger that sends the coaster car hurtling through over 19 feet of heart-pounding thrills! Then, download exclusive instructions to build an incredible second model! All K'NEX rods and connectors are made in the USA! Ages 9+. Require 2 "AA" batteries which are not included.