There is something fascinating about taking common objects and creating something new with them. My son and I had a great time experimenting with rocks, salt, and water to see what would happen.
The next step was to stir the salt and water until there was only a little salt left in the pan. I stuck right by my son's side as he stirred as I do any time he is working on the stove. As he gets older, I will back off a little, but for now I stay right beside him.