Unspillable Water Experiment, humanity game Air pressure can be stronger than gravity. This unspillable water experiment demonstrates its strength as it keeps the contents of a water glass in place, even upside down.What You’ll Need:Juice glassWater4x6 inch index cardStep 1: Fill a juice glass full of water. Let the water run over so that the lip of the glass is wet. Be sure that you fill the glass right up to the top.Step 2: Place a 4×6 inch index card on top of the full glass of water. Be sure to press the card down securely with your hand so […]