This is one web youll want to get caught in with the Web Weaver Roller Coaster Building Set; Use the included parts and pieces to send the air propelled coaster car through horizontal and vertical thrills. Once done building turn off the lights - this coaster glows-in-the-dark; Set includes over 430 KNEX parts and pieces, including rods, connectors, glow-in-the dark track and an air propelled coaster car. Additionally, builders can head to knex. Com to download instructions for a second roller coaster model. New air powered coaster car. Size H35.56, W7.62, D53.34cm. For ages 9 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult.