An introduction to the freezing and melting of water. On the lower slopes of a mountain, snow and ice melt and form a stream. Snow can be easily picked up as it is crunchy and hard. In contrast, water is hard to pick up with your hands.

First broadcast:
9 October 2007

This could be used as the introduction to a creative lesson in which children investigate whether putting a jacket on a snowman will make it melt faster or slower than one without a jacket. Plastic cups of water can be frozen and be used as the snowmen which could then be dressed in different materials. The children could investigate which material will keep the snowman alive for the longest.