DENNIS ODA /
DODA@STARBULLETIN.COM
Holy Trinity School students Ali Calhoun, 12, left, Ryan Lloyd, 13, Amber Manini, 13, and Malia Meza, 13, let out a cheer yesterday as their marble successfully negotiated the coaster course they made for the Junior Engineering Expo '06. The expo was held at Holmes Hall on the University of Hawaii-Manoa campus. About 450 students from grades 6 to 8 participated in the event, including all the neighbor islands except Molokai.