Ravensburger's interactive ball track system.
As soon as a bullet rolls through the POWER-Trigger action element, a signal goes off. And you can set what responds to this! Does he trigger the Start so that a new bullet enters the track, reset the lever, or activate the Switch? You are in control!
With the GraviTrax® ball track system you can discover gravity in a playful way and it can be expanded with various extensions for limitless building and playing fun! Add even more speed with the expansion sets.