Crumpled Bottle: We mixed water with calcium oxide (CaO) making calcium hydroxide Ca(OH)2. The Ca(OH)2 produced a lot of heat making the bottle crumple.
Electricity: An elementary student placed a battery on one side of a strip of aluminum foil. Then she held the metal base of a light bulb to the other end of the battery. She then touched the metal base of the light bulb with the other side of the aluminum foil making the light bulb light up.