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Control a Bird’s Flight
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In this engineering design challenge, learners make a bird and then control its flight with attached strings.
Sled Kite
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In this activity, learners build a sled kite that models a type of airfoil called a parawing.
Pot-in-Pot Refrigeration
Source Institutions
In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.