Fill a mixing bowl halfway with salt water. Place a small glass, open end up, in the center of the bowl. Do not allow any water to go into the glass. Cover the bowl with plastic wrap and place a marble or small rock on the plastic wrap over the small glass, allowing the plastic wrap to sag so its lowest point is over the glass. Place the bowl in the sun for several hours. When you remove the bowl from the sun, remove the plastic wrap and notice that there is some water in the glass. Taste the water; it should be salt-free.
Place a pot of salt water on the stove to boil. Suspend a t-shirt over the pot of boiling water, catching as much of the steam as possible. Always use fire safety when working with a stove. Note the salt in the pot after the water has evaporated. Wring out the t-shirt into a glass and taste the fresh water you have distilled.
Cut a hole in the side of a plastic cup and insert a piece of tubing into it. Insert the other end of the plastic tubing into the spout of a tea kettle, then tightly stuff paper towels around the tubing to make a seal. Put salt water in the tea kettle and place it on the burner on medium heat. The water should evaporate into the plastic tubing and come into the cup to condense as fresh water.
Wrap some plastic tubing in aluminum foil. Place one end of the tubing in a saucepan of salt water, then cover the saucepan tightly with aluminum foil. Place the other end of tubing in a cup or a bowl, then cover the cup or bowl tightly with aluminum foil. Put the saucepan on the stove over high heat and boil the water. It will become vapor and transfer through the foil-covered tubing into the bowl or cup, and it will condense into fresh water good enough to drink.