Ride that Rollercoaster : Forces at an Amusement Park
Louise Spilsbury
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Why Can't I Hear That?: Pitch and Frequency
Louise Spilsbury
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Turn It Up!; Turn it Down!: Volume
Louise Spilsbury
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Making Machines with Ramps and Wedges
Chris Oxlade
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Making Machines with Wheels and Axles
Chris Oxlade
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