Build it! using the 689 K'NEX parts and pieces, plus MOTOR, to build an amazing coaster. Set includes coaster track, coaster car and panther themed graphics.Ride It! by download the FREE K'NEX Ride It! app to experience your coaster like never before in virtual reality, or digitally build the roller coaster of your dreams!Ride Panther Attack in virtual reality with the included cardboard VR viewer.