Materials required: clear cups, vinegar, regular chalk. The possibility is here to also bring in some acid rain damaged leaves.
Preparation time is about 5 minutes.
This activity is appropriate for all ages.
About 10 minutes is needed for this activity.

    To begin, discuss what acid rain is, why it's a danger, and what it's effects are on the environment.
    The activity can be done as a demonstration, but may be more entertaining and educational if the kids are split up into small groups. Put some vinegar in a cup and then drop in a piece of chalk - watch as the vinegar bubbles and fizzes and the chalk is eventually eaten up and disintegrates!