Go back in time with the Infinite Journey Roller Coaster Building Set, from K'NEX. The slingshot launcher sends the coaster car up the hill and spiraling through the track! This set comes with 347 parts, primarily rods & connectors, to build a K'NEX thrill ride! And if you collect the Clock Work Roller Coaster Building Set and Revolution Ferris Wheel Building Set (sold separately), you can have a working amusement park right in your home! Recommended for builders ages 7+.