Additional Set for the Constructor - GraviTrax Power Add-on

GraviTrax - experience the power of gravity! GraviTrax — is an interactive marble run system that you can design and build yourself, experimenting with gravity and learning the laws of physics. 
 
The GraviTrax Power Switch & Trigger add-on is a unique set... of elements that, when combined with the basic version, will allow you to expand and diversify your track, offering limitless design possibilities for trajectories.