From the toy description:
Follow the color-coded instructions to build this exciting thrill ride step-by-step. Then switch the motorized blaster on, let it spool up, and watch in awe as the coaster car shoots up and out of the volcano. On the way down, the coaster car whips down, around and through the volcano with awesome speed. Instructions for a second thrilling coaster are available at knex.com.
Here's where you can get more info on the K'Nex Lava Launch Coaster