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Instructions and materials for each project: 1. Marble run: https://www.sciencebuddies.org/stem-activities/wall-marble-run?ytid=O7FBTDUDHM0&ytsrc=description 2. Submarine: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Aero_p034/aerodynamics-hydrodynamics/submarine-buoyancy?ytid=O7FBTDUDHM0&ytsrc=description 3. Underwater ...
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