Marble Races!! Which course is the slowest?

Eighth graders last week constructed roller coasters for a marble. The goal was to make the marble go through the coaster, but do so taking the most amount of time; in other words, they wanted to be the slowest. Our times ranged from 3.5 seconds to 2 minutes 13 seconds. Take a look at the some of the creations and watch a couple of the races.