NASA has a middle school (grades 7-9) guide, "Amusement Park Physcis with a NASA Twist," that emphasizes forces, motions, and measurements with worksheets to take to an amusement park. It includes activities like a "marble roller coaster run". Activities were designed by NASA Glenn and tested at Six Flags and Cedar Point amusement parks in Ohio.
http://spaceflightsystems.grc.nasa.gov/outreach/appd/appd_guide.html
http://spaceflightsystems.grc.nasa.gov/outreach/appd/documents/physics_nasatwist_guide.pdf