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    Pratt School of Engineering, Duke University
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    Learners work in groups to design and build a tower out of balsa wood. As a motivator, they can compete to build a tower with the highest strength-to-weight ratio. Learners draw structurally sound...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Each learner chews a piece of gum until it loses its flavor, and then leaves the gum to dry for several days. By weighing the gum before and after chewing, they can determine the amount of mass...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Learners design and create musical instruments from common objects; their challenge is to create an instrument that can make three different tones. They investigate how energy is transferred from...

    Ages 8 - 14
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    Pratt School of Engineering, Duke University
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    Learners display their findings after a study of surface area and volume. They build a mobile to show a commercially available box and a constructed cubical box of the same volume. Learners also...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Historically, sea floor mapping (bathymetry) was done by soundings. Soundings are taken by dropping a weight with a pre-measured rope off the side of the boat and noting the measurement on the rope...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Learners apply their knowledge of heat transfer to design two cans - one that will retain heat and one that will cool down quickly. After constructing their cans, learners fill the cans with warm...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Learners design their own experiment to explore the permeability of different materials such as soil, sand, gravel, and marbles. They will also be introduced to the basic concepts of building...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Learners design their own experiment to determine conditions that either help or hinder the decomposition of carrots by soil microbes. They place carrots in plastic bags filled with soil (with or...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Learners use a spring scale to drag an object such as a ceramic coffee cup along a table top or the floor. The spring scale allows them to measure the frictional force that exists between the...

    Ages 11 - 14
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    Pratt School of Engineering, Duke University
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    Learners construct and use a "real" 3D coordinate system out of balsa wood and foam core. They will then be able to locate coordinates in space. They will also be asked to find the...

    Ages 11 - 14

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