I placed them in the freezer and in a couple of hours we were able to see that a liquid can turn to a solid. There were two activities that I did with the ice. First, we put several pink ice cubes into a jar to watch and see what would happen if we left the solid ice cubes sit in the sun. I set the jar in the window and every once in awhile I would lift up the jar and we would describe the changes that we noticed.
By the end of the day, our solid ice had turned back to a liquid...so exciting!!! :)
The second activity, was drawing with the ice. As the ice started to melt, the food coloring would show on the paper. I had never done this activity before and the actual drawings were not that bright, but the students liked painting with the cold ice cubes. I also didn't think about how the food coloring would dye their fingers, so last minute I decided to have them use plastic baggies as gloves to protect their little hands. It worked well!
It was a great day of exploring liquids and solids for everyone! And they really understood how water can change back between a solid and liquid!