“Magic bottle” was the fifth activity aiming to realize the pressure and its effects. In order to see the reality of air pressure, they tried to hold the water inside a bottle having holes onto it. They observe that when the upper hole was filled with a finger, the liquid could be held in it. In the pre-assessment form, they were asked to draw the liquids discharged from each hole. They were signed out which holes must be filled in order not to discharge the liquid in the final assessment form.