Design build strong toothpick bridge balsa wood, Design build strong toothpick bridge balsa wood bridge science classrooms world, students construct balsa wood bridges toothpick bridges. extra credit bragging rights, hope bridge hold .. How truss bridge balsa wood ehow, Measure pieces 1/8- balsa wood base bridge. cut pieces balsa wood ruler sharp utility knife. score wood moderate pressure times. cut balsa wood single cut, pressure crush edges wood..
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