Leonardo da Vinci's Flying Machines Kit: Paper Airplanes Based on The Great Master's Sketches - That Really Fly! (13 Pop-Out Models; Easy-to-Follow Instructions; Slingshot Launcher)

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Leonardo da Vinci's Flying Machines Kit: Paper Airplanes Based on The Great Master's Sketches - That Really Fly! (13 Pop-Out Models; Easy-to-Follow Instructions; Slingshot Launcher)