Hold onto your hats, the Hyperspeed Hangtime coaster is a blast to build and set in motion. And, for added fun, plans for a second coaster are included.

• Kids will use over 600 K'NEX pieces to build a roller coaster over 2 1/2 feet high, its inverted blaster motor launches the hanging coaster car on an out-of-this-world adventure through 18 feet of track
• Features hanging car style design
• 624 pieces
• Includes idea for a second coaster model
• Requires 3 'C' batteries, not included
• Ages 9 years and up