Defending Your Castle: Build...
William Gurstelle
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Rubber Band Engineer: Build...
Lance Akiyama
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The Book of the Crossbow:...
Sir Ralph Payne-Gallwey
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Build It! Make It! Mini...
Mr. Rob Ives,
John Paul De Quay (Illustrator)
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3, 2, 1, Go!
Emily Arnold McCully
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Break the Siege: Make Your...
Rob Ives
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The Catapult: A History
Tracey Rihll
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The Art of the Catapult:...
William Gurstelle
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I Can Make Fantastic Fliers ...
Kristina A Holzweiss,
Amy Barth
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The Crossbow: Its Military...
Sir Ralph Payne-Gallwey
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I Can Make Fantastic Fliers ...
Kristina A Holzweiss,
Amy Barth
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A Low-Tech Mission
Shannon Mcclintock Miller (Illustrator)
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High-Tech DIY Projects with...
Maggie Murphy
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Catapult: Harry and I Build a...
Jim Paul
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Make a Catapult
Meg Gaertner
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Make Your Own Water Balloon...
Julia Garstecki,
Stephanie Derkovitz
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Whoosh Boom Splat: The Garage...
William Gurstelle
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The Great Pumpkin Smash
Lori Haskins Houran,
Maarten Lenoir (Illustrator)
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Construct-A-Catapult
Lee Pulis,
Pulis Lee
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Greek and Roman Artillery:...
E W Marsden
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The crossbow, mediaeval and...
Sir Ralph Payne-Gallwey
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The crossbow
Sir Ralph Payne-Gallwey
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The assisted take-off of...
Calvin Mathews Bolster
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The projectile-throwing...
Sir Ralph Payne-Gallwey
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