The U.S. News and World Report – Holly Rosenkrantz
“Three-year-old Hannah came home from school with a question. Her teacher had placed a frozen bowl of water and plastic animals on the table and the class saw it thaw. But how did it freeze in the first place? The question prompted experiments at home, with bowls placed in the refrigerator, the freezer and out in the kitchen. It made Judy Hallinen, her grandmother, laugh and it illustrated a point.” (more)