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Catapult Project - YouTube
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16 Best Tennis ball thrower ideas | catapult project, catapult, tennis ball thrower
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From the Community Stream: <p>This afternoon we went outside to do a simple machines obstacle course! We fired tennis balls… | Katapult, Holzprojekte, Holzspielzeug
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16 Best Tennis ball thrower ideas | catapult project, catapult, tennis ball thrower
Physics 0231 tennis ball launcher project 2011 2012
16 Best Tennis ball thrower ideas | catapult project, catapult, tennis ball thrower
