Grad student Peter Babilo, who researches fuel cells in the lab of Professor Sossina Haile, demonstrates that water with table salt added can serve as an electrolyte to complete an electrical path; the kids seem to get a kick out of it, as does chaperone and Safety Office staff member Larry Martinez (background). Kevin Toner and Marie-Lou Avouac prefer the pepperoni during the lunch break held on the Beckman Institute patio; fifth-grader Kevin is the son of Ritsuko Hirai Toner, lecturer in Japanese, and 10-year-old Marie-Lou is the daughter of Postdoctoral Scholar/Visitor Services staffer Barbara Avouac and Professor of Geology Jean-Philippe Avouac. Children got to inspect Bob, an autonomous vehicle and Caltech’s entry in the recent DARPA Grand Challenge desert road contest; David van Gogh, a staff member in Engineering and Applied Science, gives a tour of the SUV’s computerized innards. IPAC staff member Steve Groom helps his son, Bobby, and Dominique Anderson, daughter of Space Radiation Lab staff member Caprece Anderson, make rockets in an exercise led by Caltech Precollege Science Initiative personnel; in the rear is Mark Abajian, Michelson Science Center staffer, who was also helping the kids. Lydia de Pillis Lindheim (left), daughter of Center for Advanced Computing Research staff member Jan Lindheim, and Andrea Arvizu, daughter of Purchasing and Payment Services staffer Rudy Arvizu, enjoy building model cars while visiting the carpentry shop.