While ice is usually referred to as ice cubes, indeed, most are not really cubes at all. In this 5E learning-cycle lesson, students will investigate different shapes of ice and how shape affects the speed of melting and the rate of cooling a glass of water. Students will compare three different shapes of ice with the same volume but different surface areas. The International Technology and Engineering Educators Association states that middle-level students should learn that "modeling, testing, evaluating, and modifying are used to transform ideas into practical solutions" (ITEA 2007, p. 103). This standard introduces the engineering practices of testing and evaluating while students investigate ice melting rates and ice-tray design. As stated in the "Framework for K-12 Science Education," under Structure and Properties of Matter, students should understand that "particles combine to form the variety of matter one observes". Students will discover that melting is a phenomenon that takes place at the surface of a solid, and melting rate is proportional to surface area. This activity can be integrated with a unit dealing with states of matter. (Contains 8 figures.)