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Forrest Speciale from Mad Science entertains an audience with a blower as volunteer, Leeanne Osborn, 9, left, watches during a demonstration in the Bernoulli Principle at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo Saturday, March 2, 2013, at William Jessup University in Rocklin. -
Volunteers, a roll of toilet paper and a blower help to demonstrate the Bernoulli Principle with Mad Science's Forrest Speciale at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo at William Jessup University. -
Madison Urrutia, 10, of Roseville helps to demonstrate the Bernoulli Principle with Mad Science's Forrest Speciale at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo at William Jessup University. -
Leeanne Osborn, 9, acts a bit hesitant about volunteering on stage for a science experiment at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo at William Jessup University. -
Chloe Belskey, 4, of Roseville plays with a science experiment based on static electricity at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo Saturday, March 2, 2013, at William Jessup University in Rocklin. -
Aaron Mikkelson, right, of Lincoln shows off his science project to Kian Mirkazemi, 13, left, and Maggie Brodie, 10, center, at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo Saturday, March 2, 2013 at William Jessup University in Rocklin. -
A demonstration showing magnetic fields at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo at William Jessup University. -
Liam Trott of Twelve Bridges School demonstrates his trebuchet, a medieval weapon at the Placer County's annual STEM (Science, Technology, Engineering and Math) Expo at William Jessup University. -
Placer County's annual STEM (Science, Technology, Engineering and Math) Expo at William Jessup University.
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