Scott Ellis 6:45 p.m., Dec. 10
iAroc Robotics Competition
More than 20 teams of middle and high school students compete with robots designed using Roombas. Competitors have built "an autonomous robot that can find its way through a set of fixed obstacles, locate an infrared and visible home station beacon, and activate a mechanical push-action switch at the home station." Saturday: team setup, trial runs, technical presentations; Sunday: competition. Public welcome. Included in admission (0-$11.75). 619-238-1233.