LAUNCH LOGISTICS: It really is all about the trebuchet, and its offbeat, pumpkin-ready engineering, when it comes to sending squash high into the air. You'll see plenty of "homemade" machines, all handles and launchers, and you'll witness a number of pumpkins in flight. Visiting kids might be inspired, and, if so, they'll be able to build small trebuchets, the kind that can launch marshmallows and candy and such. And, of course, they'll leave with a most excellent souvenir: the spirit of science and innovation. One of the goals of the day is to inspire young people and show them the fun behind engineering and the scientific pursuits. But, yeah, there are many laughs to be had, and pictures to be taken, and a lot of pumpkin guts to mop up. Leave that to the CSUF students and Science Center volunteers, though; your role is simply to enjoy a wacky but big-brained fall tradition, in all of its chunkin glory.