This set is for the (father son)( father daughter)couple that enjoys spending time together and learning.The track is not completely finished I did this for a reason. Now the family or the collector can have fun doing their own stuff.3 of the engine run the last one I left for the mechanically inclined and I have not finished the scenery.There are new hot wheels for the auction house and a army scenery.For the right person this will become something special.With all the extras you won't need to buy anything unless you want to.