K'Nex Amazin' 8 Roller Coaster building setTwist, Turn, Dive & Swoop The KNEX Amazin' 8 Roller Coaster building set lets you build a real working roller coaster! A motorised chain lift sends the coaster car screaming through twists and turns 76m high. Building with K'NEX aids the growth of key developmental abilities; fine motor skills, hand eye coordination and dexterity while encouraging building and cognitive skills. Features: 448 K'NEX parts and instructions Build a working, Out of this