Test your launching skills at the 2nd Annual STEM Showcase!  Participants build their catapults at school or home using the guidelines below, then bring them to the event on April 26th. 
Catapult Design Guidelines:  (click to download)

High School students

Middle School students

Elementary School students
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See also: Catapult Teacher Guide & Resources
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A participant of the 2013 STEM Showcase explores engineering activities.