Kelsey Ridley on Twitter: "Apologies to other top floor classes who have had to put up with the sound of popping balloons, but we cheer every time someone successfully pops the balloon
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2011-2012 Rube Goldberg Challenge - Pop a balloon - YouTube
Jefferson Students Design Rube Goldberg Machines - The Lincoln County News
Goldbergh Balloon gewatteerd jack met metallic finish • Goud • de Bijenkorf