This idea was in Family Fun Magazine this month. It was really fun and easy.
~Fill an ice cube tray with water and food coloring. Let freeze. ~Fill a cake pan with water and let it partially freeze (about an hour) ~Put the colored ice cubes into the cake pan. ~Put a cup filled with water into the cake pan to displace water to make a hole for hanging later. ~Let freeze overnight (we were able to leave ours out over night.) ~Pop it all out and hang from a shepherd's hook or a fence or eaves.