Objective: Children will discover earth materials made smooth by wind and water.
Materials: smooth rocks and pebbles, paint, glitter (optional)
- After reading the article, children will know that over time, water and sand rub sharp pieces of glass into smooth, shiny, treasures. Explain that something similar also happens to sharp pieces of rock. Over many years, wind and water rub against the rock. Very slowly, the edges start to smooth out. They get smoother and smoother. And some of them become smooth rocks and pebbles!
- Go on a rock hunt with kids and challenge them to find the smoothest rocks and pebbles they can. (Alternatively, you can bring in your own supply.) Let children examine the rocks and feel their smoothness.
- Finally, let children paint their rocks and pebbles different colors—just like smooth sea glass! If you like, add a little glitter to the paint to give it some shine. (SKILL: Scientific observation)