K'NEX Hyperspeed Hangtime Roller Coaster Building Set Builds over 2.5 feet high|Exclusive inverted blaster motor|Includes hanging coaster car|18+ feet of track| Requires 3 C batteries, not included| Recommended for ages 9+ Build a coaster with inverted blaster motor technology! Includes over 620 K'NEX pieces K'NEX Rods and Connectors, Made in the USA Recommended for builders ages 9+ Requires 3 "C" Batteries, not included