KNEX Hyperspeed Hangtime.
Blast off faster than the speed of light with the inverted blaster motor which launches your car on an out of this world adventure through 18 feet of roller coaster track. Includes over 600 pieces and is over 2.5 feet high. Build a high speed roller coaster with inverted blaster motor technology One supplied. For ages 7 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. Show more Show less