1. Turning Salt Water Into Fresh Water
The final activity on our list of 10 science activities for toddlers and preschoolers is very significant because it teaches the children the value of fresh water. You need water, salt, plastic wrap, two bowls, and a small rock for this experiment. Mix water and salt in one bowl. Put another smaller bowl or a cup inside the bigger one with salt water but without letting any salt water to get into the cup. Put a plastic wrap over the bowl and seal it. Put a small rock on top of it but in the middle of the surface above the smaller cup inside. Put all this in a sunny area for an hour and then observe what happens. Water drops should form beneath the plastic and they should flow to the empty smaller cup inside. Wait a few more hours and then remove the plastic. By now, there should be a small amount of water inside the cup so you can taste it. The water should not be salty so you can discuss what happened and how. Help your children understand how the water vaporized from the sun and returned to the previous state, fresh water.
Artem Varnitsin/Shutterstock.com
