When we finally had enough empty milk and juice cartons to make blocks I cut the tops off the cartons, the kids dripped various combinations of food coloring into the cartons and we filled them with water and put them outside to freeze.
A couple of days later we peeled the cartons away from the ice blocks…some were frozen a little more solid than others.
The colored water that dripped out made for pretty snow to play in
Colorful snow balls!
Now I am back to hording the empty cartons and yogurt containers to make more colorful ice blocks!