The we saw this amazing kinetic marble track on YouTube and the dad has posted all of the directions on Instructables. The track is built along the perimeter of his son’s room and runs along the wall. As you watch the video the marble challenges seem to get more difficult and interesting.
We’d say the difficulty of building this marble track is fairly high but if you’re a seasoned woodworker we challenge you to one up this video and create an even longer track. Just consider how you attach the track to the wall so if you move you can easily take it with you.