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Marble Ride
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In this activity, challenge learners to design a roller coaster ride for a marble using cardboard and other simple materials.
Periscope
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In this optics activity, learners build a spy tool to secretly view things over walls or around corners.
Scytale Messages
Source Institutions
In this activity, learners use a soda can to decode a secret message. Learners wrap scytale (pronounced ski-tally) code around a can and challenge friends to see if they can crack the codes.