Knex ~ Verticle Viper Coaster. New in box. Enjoy exciting thrills with your child as you and he or she use this K'NEX Vertical Viper 12435 set to build a roller coaster for a small-scale amusement park experience. The motorized chain lift offers a realistic touch. Lets your child build a high-speed roller coaster
For a small-scale amusement park experience in your home. More than 300 K'NEX pieces
Include a variety of rods and connectors to help simplify the construction process. Motorized chain lift
Emulates realistic operation (motor requires 2 AA batteries, not included). Suitable for children ages 7 and older. So you can have fun building with your child.