Living in North Carolina, it's pretty rare that we have an entire day (24 hours!) with temperatures that don't go above freezing. However - last week - we had just that.
Which means - it was a perfect opportunity to make "Marbles"!
Pretty simple concept.
Balloons. Add food coloring. Fill with water. Tie, and freeze (put outside). Wait 24 hours. Remove balloon. Enjoy - - until the temperatures warm up, at least!