Additional Supplies Needed: masking tape, metric ruler, scissors, colored pencils, 100 pennies, salt, food coloring, timer, magnetic compass or compass phone app

Additional Supplies Needed: masking tape, metric ruler, scissors, colored pencils, baking soda, vinegar, a straw, piece of fruit, marker, onion, potato, rubbing alcohol, 2 pennies, sugar, garbage bag, wax paper

Additional Supplies Needed: masking tape, metric ruler, scissors, foil, 9-volt battery, vinegar, candle, soft candy, salt, wax paper, baggie, dish soap, timer, red cabbage, baking soda

Additional Supplies Needed: masking tape, metric ruler, timer or stopwatch, raw egg, markers, scissors, pencil, salt, rubbing alcohol, food coloring, plastic food wrap