Pick an airframe (I was thinking the very versatile wing) and run two spars, one on each wing tip that extend forward and rearward a few inches past the front and rear of the plane. Put magnets at the ends of the spars. Try to link up as many "cars" as possible and create a sky train.
Just a thought.
Be safe and have fun,
Tommy
Just a thought.
Be safe and have fun,
Tommy