Knex Hornet Swarm Dueling Coaster For Ages 9+ ; 1,116 Parts Builds 2 Roller Coasters Over 3.6 ft Tall Motorized performance and roller coaster sounds, 4 Coaster Cars Requires 2 "AA" & 3 "AAA" batteries (not included) Step by step instructions provided to build both tracks Roller Coaster Dimensions: 36" x 12" x 24"