The 5th graders were entertained , intrigued, and educated by the Fire and Ice program which explored extremely cold and hot temperatues. They say a solid, dry ice, turn from a solid to a vapor which is sublimation. A penny became bendable from extreme cold. Then a balloon's air molecules contracted so much, it looked like there wasn't any air in the balloon when it got extremely cold, but it expanded back out to regular balloon size when the air warmed up inside of it to room temperature. In the picture, the students are seeing an explosion made with hydrogen in a ballon. When salt was added it created color similiar to fireworks.
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