First graders experimented with different states of matter!  We placed a hershey kiss inside of a bag and held it in our hands for a few minutes.  The students were amazed that the chocolate melted and changed from a solid to a liquid.  Then we placed the bags in the freezer to discover that the liquid chocolate froze, and turned back into a solid.  Before the experiment, the students made hypotheses to guess what they thought was going to happen to the solid chocolate.