Reach for the sky with the Sky Sprinter Roller Coaster Building Set - our tallest Roller Coaster ever; Build with 797 KNEX pieces including classic rods, classic connectors, and track; Use the included blaster motor to shoot the red coaster car to a height of 7 feet; Then watch it wind its way down the track to complete its journey; For more fun, download instructions for an exclusive 2nd coaster. Models can be built one at a time. Size H35.56, W8.89, D53.34cm. Batteries required: 3 x C (not included) plus . 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.