K'nex Roller Coaster 63030 & MOTOR
 
This is a fantastic fun set that when built is approx 8ft long and 3ft high!
(We have also added a motor which can be connected directly to the winding mechanism) 

A great project - more challenging than newer sets 
This set has the older, better quality robust parts (not flimsy like the newer ones)

My son built the Roller Coaster with a loop (See Pictures)
Instructions include another smaller model that can be built using the k'nex pieces (Spiral)

The model has been dismantled and all the pieces have been sorted and carefully bagged 
There is also a bag of extra pieces which I presume are used for the other model, but I haven't checked 

 ***The box is a little tatty***
Please see photos