This is so totally awesome! There are 36 marked spots on this piece of 90 degree angled metal. There are 36 little magnets in the bar with the red handle, below the angle stock. Put the magnets in place, and you can load a steel or iron ball onto 1,2,3,4,5,6 or other- I reccomend 1,4,9,16,25,36. Pull the handle to lower the magnets and the balls race down the angle, getting a different amount of acceleration, thus speed, based on location. Zing, they roll down, to the left, and shoot off the little level bit at the end of the track. Now go to "pt 2"