1st O poured water into the ice cube tray
Then she squeezed in the food coloring. She had a lot of fun mixing colors. We put straws in the ice cubes to use as handles while she painted.
We put the ice tray in the freezer and forgot about it for a week. I finally remembered, and O had lots of fun painting with her ice cubes :) She painted on posterboard with the shiny side down. You need thick paper since the ice cubes melt and things get quite watery :)
After she was finished, I put the ice cubes back in the freezer to save for another hot day!