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Paper Airplanes
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  In this activity, learners explore the properties of paper by constructing and modifying paper airplanes.
  
Color Contrast
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  Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent.
  
Spinning Blackboard
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  Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.
  
Resonant Rings
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  Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces.